Social Media and Short-Form Video Platforms Drive Language Innovation
lisa5201/getty images
Algospeak Adam Aleksic (Every (UK, July 17th) Knopf (USA, July 15th))
You won’t age, just as slang is wrapped in bamboo. In Adam Aleksic’s chapter Algospeak: How Social Media Will Change the Future of Language, this phenomenon is discussed. Phrases like “Pierce Your Gyat for Rizzler” and “WordPilled Slangmaxxing” remind me that as a millennial, I’m just as distant from boomers as today’s Alphas are.
Linguist and content creator (@etymologynerd), Aleksic has ignited a new wave of linguistic innovation fueled by social media, particularly short video platforms like TikTok. The term “Algospeak” has been traditionally linked to euphemisms used to avoid online censorship, with recent examples including “anxiety” (in reference to death) or “segg” (for sex).
However, the author insists on broadening the definition to encompass all language aspects affected by the “algorithm.” This term refers to the various, often opaque processes social media platforms use to curate content for users.
In his case, Aleksic draws on his experience of earning a living through educational videos about language. Like other creators, he is motivated to appeal to the algorithm, which requires careful word selection. A video he created dissecting the etymology of the word “pen” (tracing back to the Latin “penis”) breached sexual content rules, while a discussion on the phrase “from river to sea” remained within acceptable limits.
Meanwhile, videos that explore Gen Alpha terms like “Skibidi” (a largely nonsensical term rooted in scat singing) and “Gyat” (“Goddamn” or “Ass”) have performed particularly well. His findings illustrate how creators modify their language for algorithmic advantage, with some words transitioning online and offline to achieve notable success. When Aleksic examined educators, he found many of these terms had entered regular classroom slang, with some students learning the term “anxiety” before understanding “suicide.”
A standout aspect of his study lies in etymology, investigating how algorithms propel words from online subcultures into mainstream lexicon. He notes that the misogynistic incel community is a significant contributor to contemporary slang, evidenced by its radical nature that can outpace linguistic evolution within a group.
Aleksic approaches language trends with a non-judgmental perspective. He notes that the term “anxiety” parallels earlier euphemisms like “deceased,” while “Skibidi” is reminiscent of “Scooby-Doo.” He frequently mischaracterizes slang within arbitrarily defined generations, which claim to infuse toxic narratives into the evolution of normal languages.
The situation becomes more intricate when slang enters mainstream usage through cultural appropriation. Many contemporary slang terms, like “cool” before them, trace back to the Black community (“Thicc,” “bruh”) or originate from the LGBTQ ballroom scenes (“Slay,” “Yas,” “Queen”). Such wide-ranging adoptions can sever these terms from their historical contexts, often linked to social struggles and further entrenching negative stereotypes about the communities that birthed them.
Preventing this disruption of context is challenging. Successful slang’s fate is often to be stripped of its original nuances. Social media has drastically accelerated the timeline for language innovation. Algospeak is a necessary update, yet it can become quickly outdated. However, as long as algorithms exist, fundamental insights into how technology influences language will remain important.
Victoria Turk is a London-based author
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Ancient humans adapted to deeper forests as they journeyed from Africa, moving away from the savanna.
Lionel Bret/Eurelios/Science Photo Library
This is an excerpt from our human stories, a newsletter covering the archaeological revolution. Subscribe and receive updates in your inbox every month.
Our human origins trace back to Africa. While this has not always been clear, it is now widely accepted.
This truth can be understood in two ways. The earliest known species closely related to us emerged from Africa, dating back 7 million years. Additionally, the oldest representatives of our own species, Homo sapiens, also originated from Africa.
Here, I will focus on the narrative of modern humans originating in Africa and their subsequent migrations across the globe. The introduction of DNA sequencing technology in the latter half of the 20th century enabled comparisons between different populations. This research demonstrated that African populations exhibit the greatest genetic diversity, while non-Africans show relative genetic similarity (despite visible differences such as skin color).
This genetic distinction serves as a telling indicator. It suggests that Africa was our birthplace with a diverse population, from which all non-Africans descended from a smaller subset that left this ancestral home to settle elsewhere. Geneticists affirmed this idea as early as 1995, and further evidence has since supported this claim.
However, there is a discrepancy between archaeological evidence and genetic findings.
Genetics indicates that all living non-Africans are descendants of a small group that left Africa around 50,000 years ago. Aside from minor uncertainties about the exact timeline, this conclusion has remained consistent for two decades. Conversely, archaeologists highlight numerous instances of modern humans existing outside Africa long before this timeline.
In Greece, a modern human skull found in the Apidima Caves dates back 210,000 years. The jawbone from Misliya Cave in Israel has been dated to at least 177,000 years. Additionally, there are several debated sites in China that may contain remains of modern humans. “Moreover, there’s an ongoing discussion on the earliest inhabitants of Australia,” says Eleanor Scerri from the Max Planck Institute for Geoanthropology in Germany, with some proposing human presence as early as 65,000 years ago.
What is the explanation for this disparity? Has our extensive genetic data misled us? Or is it true that we all share a common ancestry tied to a significant migration event, while older remains represent populations that did not survive?
Scerri and her team sought to understand this conundrum.
African Environment
The researchers debated the habitats of modern humans in Africa. “Did they simply migrate across diverse African grasslands, or were they adapting to vastly different environments?” asks Scerri.
To address this question, they needed extensive data.
“We began by analyzing all archaeological sites in Africa dating back 120,000 to 14,000 years ago,” explains Emily Yuko Hallett from Loyola University in Chicago. The team constructed a database identifying the climate at various locations and times.
A significant shift was observed around 70,000 years ago. “Simply examining the data without complicated modeling shows this climatic change,” notes Andrea Manica from the University of Cambridge. The range of temperatures and rainfall suitable for human habitation had notably expanded, leading people to venture into deeper forests and arid deserts.
However, mere observation is insufficient; the archaeological record is inherently incomplete and often biased.
“In certain regions, no archaeological sites exist,” remarks Michela Leonardi from the Natural History Museum in London. This absence might not reflect a lack of human occupancy, but rather the lack of preservation. “In more recent periods, preservation is easier due to the increased data availability,” she adds.
Leonardi devised a statistical modeling technique to determine if an animal shifted its environmental range. Could humans have transitioned from grasslands to diverse habitats, such as tropical rainforests? The team initially thought this modeling would take two weeks, but it took five and a half years.
Ultimately, the statistics affirmed their initial observation: around 70,000 years ago, modern humans began occupying a broader range of environments. The findings were published on June 18th here.
Jack of All Trades
“At 70,000 years ago, our species appears to have transformed into the ultimate generalist,” states Manica. From this period onwards, modern humans adapted to a variety of complex habitats.
This could be misinterpreted. The team did not imply that prior to H. sapiens people were incapable of adaptation. In fact, studies of extinct human species highlight that adaptability has increased over time.
“Humans were inhabiting environments vastly different from the early stages,” observes Scerri. “We’ve found evidence of habitation in mangrove forests, rainforests, desert edges, and highlands like those in Ethiopia.”
It appears that this adaptability is what allowed Homo sapiens to thrive during environmental changes in Africa, while other species like Paranthropus did not; they remained too rigid in their lifestyle to adapt.
What likely transpired in our species 70,000 years ago is that existing adaptability became pronounced.
Some of this understanding only becomes clear when considering the diverse habitats humans occupied. “One might think of deserts and rainforests in rigid terms, but there are actually numerous variations,” explains Scerri. “There are lowland rainforests, montane forests, marshes, and periodically flooded woodlands.” The same diversity applies even within desert environments.
Before, H. sapiens “did not exploit the full range of potential habitats,” states Scerri. “But around 70,000 years ago, we see the beginning of this expansion into more types of forests and rainforests.”
This narrative intrigued me, as I had been contemplating an opposite idea.
Great Quarantine
Last week, I authored a piece about the extinction of local human groups: it appears that some H. sapiens populations vanished without a trace in modern genetics. After departing from Africa, they faced challenges in harsh environments, eventually succumbing during encounters with the first modern humans in Europe. These lost groups fascinated me. Why did they fail while others that entered Europe thousands of years later found much success?
The discovery that African groups expanded their environmental niches 70,000 years ago provides a partial explanation. If these later migrations involved more adaptable populations, they may have been better equipped to face the unfamiliar environments of Northern Europe—and subsequently Southeast Asia, Australia, and the Americas where their descendants would eventually journey.
A crucial point: this does not suggest that all populations 70,000 years ago thrived. “Not all humans instantly turned into successful populations,” Scerri explains. “Many of these groups disappeared, both inside and outside of Africa.”
Moreover, as with any significant discovery, this study introduces as many questions as it resolves. Specifically: what triggered modern humans to become more adaptable around 70,000 years ago?
Manica notes that skeletal morphology supports this idea. Ancient fossils classified as H. sapiens today exhibit only some of the traits we typically associate with modern humans. “Starting around 70,000 years ago, we broadly witnessed the emergence of many of these characteristics as a collective,” he asserts.
Manica posits that moving into new environments may have facilitated increased interaction between previously isolated populations. For instance, if two groups were separated by desert, they wouldn’t encounter or exchange ideas or genetic material until they learned to adapt to desert conditions.
“There may also be positive feedback,” suggests Manica. “With increased connectivity comes greater flexibility… breaking down barriers and fostering further interaction.”
To conclude, in a story about these lost populations, I mentioned that one of the greatest challenges for human groups was isolation. Without neighbors, a small group can face extinction due to minor setbacks. If Manica is correct, the opposite trend unfolded in Africa. Populations expanded and became increasingly connected, leading to a surge of creativity that allowed our species to spread across the globe.
In this light, the success of the last migration out of Africa could be attributed to the need for community. Without others, we may be vulnerable and at risk of failing. The notion of preparing for an apocalypse alone in isolation may be fundamentally flawed.
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Current forest die-offs due to global warming resemble those from the Permian and Triassic extinction events.
Ina Fassbender/AFP via Getty Images
Following a dramatic increase in carbon dioxide levels 252 million years ago, the death of forests resulted in enduring climate alterations, with the greenhouse effect persisting for millions of years.
Researchers striving to comprehend this phenomenon, which triggered the largest mass extinction in Earth’s history, caution that ongoing greenhouse gas emissions may lead to similar outcomes.
The extinction events of the Permian and Triassic are believed to have been triggered by extensive volcanic activity in what is now Siberia, elevating atmospheric CO2 concentrations.
The planet’s surface temperature soared by as much as 10°C, with average temperatures in the equatorial regions climbing to 34°C (93°F)—a rise of 8°C above the current average.
Although some scientists have recently posited that these mass extinction events may have limited effects on terrestrial ecosystems, Andrew Meldis from the University of Adelaide expresses confidence that life was nearly extinguished 252 million years ago.
“Small pockets of life might survive mass extinctions in isolated enclaves, but many areas within the Permian-Triassic fossil record reveal a complete ecosystem collapse,” notes Meldis.
He and his team scrutinized the fossil record to investigate why the Super Greenhouse event, which drives mass extinction, lasted five million years—far longer than the 100,000 years predicted by climate models.
The findings revealed that vast expanses of forests, originally with canopies of around 50 meters, were supplanted by resilient underground flora, typically ranging from 5 cm to 2 meters in height. Additionally, peat marshes, significant carbon storage ecosystems, vanished from tropical areas.
Employing computer models of Earth’s climatic and geochemical systems, researchers indicated that the depletion of these ecosystems contributes to elevated CO2 levels persisting for millions of years. This predominantly occurs because vegetation plays a crucial role in weathering, the mechanism that extracts carbon from the atmosphere and sequesters it in rocks and soil over extensive timescales.
With atmospheric CO2 levels rising rapidly, the parallels to the present are striking, asserts Meldis. As temperatures escalate, tropical and subtropical forests may find it increasingly challenging to adapt, potentially surpassing thresholds where vegetation ceases to maintain climate equilibrium.
Meldis explains that simply restoring former ecosystems will not lead to a “ping-pong effect.” He emphasizes that the atmosphere cannot be swiftly rejuvenated after the loss of the equatorial forest.
“You’re not transitioning from an ice house to a greenhouse and then back; the Earth will find a new equilibrium, which may differ significantly from prior states,” he elaborates.
Catlin Maisner, a researcher at the University of New South Wales—who was not involved in the study—describes reconstructing these events as analogous to “trying to assemble a jigsaw puzzle with many missing pieces,” yet acknowledges the team’s arguments as “plausible.”
However, she notes considerable uncertainty regarding oceanic processes during this period. “The ocean harbors far more carbon than land and atmosphere combined, and we still lack a comprehensive understanding of how marine biology, chemistry, and physical circulation were affected during that event,” cautions Meissner.
On June 26, the Advisory Committee on U.S. Vaccination Practices (ACIP) announced new recommendations regarding flu vaccinations that utilize controversial preservatives often misattributed to autism. While this change is unlikely to restrict access to vaccines, it reflects a broader U.S. governmental effort to uphold the integrity of the vaccination recommendation process.
What Changes Have Occurred with ACIP?
ACIP is an advisory body that provides expert recommendations to the U.S. Centers for Disease Control and Prevention (CDC) on vaccinations. Established in 1964, its members are appointed by the Secretary of Health and Human Services, currently Robert F. Kennedy Jr.
Kennedy recently dismissed all 17 members of ACIP, claiming it was necessary to eliminate conflicts of interest. “A complete overhaul is essential to restore public trust in vaccine science,” Kennedy stated in a press release.
This action faced pushback from many public health experts. “Prior to Kennedy’s actions, I had confidence in ACIP. Now, I have none,” remarked Amesh Adalja from Johns Hopkins University. “It’s reckless and dangerous to unilaterally dismantle an entire panel of experts,” added Tinatan, president of the American Infectious Diseases Association, in a statement.
Kennedy appointed eight new members, though one resigned before the inaugural meeting. Several of the new members have raised concerns regarding various vaccines. For instance, Robert Malone, a pioneer in mRNA vaccine technology, discussed on Joe Rogan’s Experience podcast in 2021 the potential links between Covid-19 vaccines and heart-related issues. A 2024 study found that while there was a lower heart attack and stroke rate post-vaccination among approximately 46 million adults, there was an increase in rare side effects such as myocarditis and pericarditis.
A CDC spokesperson stated, “Dr. Malone is a seasoned physician who advocates for rigorous, evidence-based evaluations rather than uncritical acceptance. He does not oppose vaccines based on flawed data or policies—noting the necessity for better information.”
Adalja expressed concerns that some new members lack significant expertise in vaccines, infectious diseases, and epidemiology, suggesting that trust in ACIP under Kennedy’s leadership is dwindling. “In reality, he effectively made ACIP an independent entity,” he stated.
What Changes Have Been Made to Vaccine Recommendations?
In May, Kennedy stated in a video on social media platform X that the CDC would halt Covid-19 vaccine recommendations for most children and pregnant individuals. This decision was taken without ACIP’s input, breaking longstanding precedent.
The new ACIP also voted to discontinue recommendations for flu vaccines containing Thimerosal, a preservative used in several vaccines, during its first meeting. Additionally, the panel advocated for seasonal flu vaccinations for all individuals older than six months.
What is Thimerosal? Is it Safe?
Thimerosal is a preservative used in various vaccines to prevent bacterial contamination and contains trace amounts of mercury, which the body metabolizes into a byproduct known as ethyl mercury.
Ethyl mercury is distinct from the more harmful methylmercury found in certain environmental sources, such as fish. Methylmercury is highly toxic and can accumulate in the body, while numerous studies have shown that low doses of ethyl mercury are safe. Additionally, it is typically cleared from the bloodstream within 30 days, even in infants.
Despite claims from anti-vaccine proponents, no studies have substantiated a link between thimerosal and autism. A 2014 survey of nearly 1.3 million children found no association between vaccines, including thimerosal-containing vaccines, and the development of autism.
The U.S. Food and Drug Administration conducted a thorough review of thimerosal use in pediatric vaccines in 1999, identifying no side effects aside from minor allergic reactions at the injection site.
Which Vaccines Contain Thimerosal?
The utilization of thimerosal in vaccines has decreased as formulations have evolved, with a shift toward single-dose vials minimizing the risk of bacterial contamination.
Thimerosal is not included in routine childhood vaccinations except for certain flu shots, which are used infrequently. For instance, only 3% of children over the age of 65 and about 2% of adults received the flu vaccine containing thimerosal during the 2024-2025 influenza season.
How Will New U.S. Vaccine Policies Compare to Other Countries?
Other nations have continued to recommend thimerosal-containing vaccines. For instance, the UK removed thimerosal from routine vaccinations between 2003 and 2005 to mitigate mercury exposure but later found no evidence of harm. They employed several vaccinations, including those with thimerosal, during specific flu seasons targeting H1N1.
In 1999, the European Medicines Agency endorsed the use of vaccines without thimerosal even in light of no evidence of harm. In 2004, after new data re-affirmed the safety of preservatives, the agency noted that “the benefits of vaccination significantly outweigh any exposure concerns, including thimerosal.” A further review of their guidelines in 2016 reaffirmed their relevance.
Can I Get the Vaccine for Myself or My Child?
Since most seasonal flu vaccinations do not contain thimerosal, it is unlikely that the ACIP’s recommendations will hinder vaccine access. Additionally, the CDC’s updated guidelines regarding Covid-19 vaccines for children and pregnancies should not affect the availability of vaccines.
Wimbledon is currently underway, and I’m seizing the moment to present a bold assertion: tennis holds a pivotal role as the most significant sport in the evolution of video games.
Although modern gaming giants like EA Sports FC, Madden, and NBA 2K dominate the charts, tennis lays the groundwork for the industry. Originally conceived as a straightforward bat-and-ball game by scientists in 1958, William Higginbotham introduced what is recognized by the Brookhaven National Laboratory in Upton, New York, as the first video game created solely for entertainment. This tennis game was exhibited on an oscilloscope during the lab’s annual open house, and the growing queue of players hinted at a burgeoning interest in video gaming.
Ralph Baer, the creator of the first mass-produced gaming console, Magnavox Odyssey, incorporated tennis into his innovations. While working for defense contractor Sanders Associates in the late 1960s, Baer’s prototype could only display vertical lines and square dots. Upon Magnavox’s release of the console in 1972, the standout games included table tennis and tennis, with players using a plastic overlay on the TV screen. This allowed two players to hit the ball back and forth, introducing a degree of “spin” via a dial on the controller. The simplistic controls of these tennis games limited player skill but laid the foundation for future development.
This progression inevitably led to Pong, widely regarded as the first major success in arcade gaming. Nolan Bushnell, Atari’s founder, was inspired by the tennis game on the Odyssey and sought to improve upon it. Collaborating with programmer Al Alcone, they divided the bat on-screen into eight sections, each capable of deflecting the ball at varied angles. This marked the dawn of precise player input, a critical aspect for future video games that allowed players to showcase skill and timing. The success of Pong prompted Bushnell to create a single-player variation, Breakout, wherein players aimed to hit a ball against a disappearing brick wall—effectively a one-player tennis game. Its brilliance significantly influenced the Japanese gaming landscape, leading to NAMCO’s entry into the arcade scene. Additionally, it inspired Tomohiro Nishikado in developing Space Invaders in 1978, laying the groundwork for the entire Shoot ’em up genre.
Before his passing in 2009, Ralph Baer showcased a prototype of the “brown box,” the first console. Photo: Jens Wolf/AP
Tennis simulations also played a crucial role in the rise of home computer gaming in the 1980s. Games like ZX Spectrum’s Match Points and International Tennis on the Commodore 64 delivered an engaging, easy two-player experience, contrasting with the more complex football simulations. This accessibility drew in gamers, and Nintendo capitalized on this with titles like Mario Tennis and Wii Sports, which became some of the most beloved sports games.
As consoles evolved, tennis games became staple titles across generations, often drawing in those new to gaming. While not boasting the flashy allure of soccer or basketball simulations, they maintained appeal for casual players. Titles such as Namco’s smash court, Codemasters’ Pete Sampras Tennis, 2K’s Top Spin, and Sega’s Virtua Tennis enriched the fundamental concept of rallying the ball over the net. Tennis uniquely features a confined play area that provides extensive enjoyment, intricate skill mechanics, and an easily understood ruleset within a concentrated, single-screen environment.
Have you ever found yourself waiting in line outside scientific research establishments in Upton, New York, in the fall of 1958, playing Space Blaster or Kung Fu games? I doubt it—it would have seemed uncomfortable and enigmatic to many attendees. Take a look at Computer Space, the first commercial space shooter arcade game released in 1971, designed by Nolan Bushnell and Ted Dabney. It performed modestly, but Pong’s success transformed the gaming landscape. Its controls were overly complex, and the abstract concepts were off-putting. Tennis subtly became the gateway for video games, adeptly infiltrating homes and entertainment venues, creating a new cultural phenomenon.
What to Play
Retro Treat… Armageddon of the Worm: Anniversary Edition. Photo: Team 17
I’m inclined to recommend a tennis game—classics like Virtua Tennis or Top Spin 4 come to mind—but for a twist, consider Worms Armageddon: Anniversary Edition. This modern take on the beloved 1999 title is a chaotic, multiplayer turn-based game where players eliminate opponents using an arsenal that includes sheep launchers, banana bombs, and concrete donkeys.
It’s an absurdly entertaining experience, demanding profound tactical thought and mastery over angles and trajectories. The game also unlocks access to previous titles from the Mega Drive and Game Boy series—an excellent deal.
Available on: PS5, Switch, Xbox Estimated playtime: 10 hours to 25 years
What to Read
£80 Pop…Mario Kart World. Photo: Nintendo
A pressing issue: Video Game Prices on the Rise. Continuing The BBC has reported on consumer grievances regarding video game costs, with major titles reaching up to £80. Increased production and development expenses contribute to this surge, yet attention should also be directed towards the hefty salaries of CEOs in certain industries.
Curious about how Metacritic operates? GamesIndustry.biz interviewed the founder to uncover the science behind score aggregation. Several intriguing discussions arose, including the practice of linking game publisher bonuses to the latest project metascore.
Certain sites, such as IGN, have covered recent comments from former Xbox executive Laura Fryer on the end of Xbox hardware. The announcement about Microsoft’s future strategies, including the ROG Xbox Ally X Handheld PC, sheds light on potential changes ahead.
I love your console… Sega Mega Drive. Photo: Keith Stuart/Guardian
This inquiry is from Johnny Biscuits:
“Five years ago, numerous media commentators claimed that the PS5/Xbox Series X would be the final generation of consoles. What is the current opinion?”
As mentioned, early Xbox employee Laura Fryer has suggested winding down hardware development in favor of Microsoft’s focus on Xbox applications across various platforms. This shift is becoming increasingly evident, particularly with announcements like the ROG Xbox Ally and the Meta Quest 3S Xbox Edition, as well as Samsung integrating Xbox titles into their smart TVs. However, Microsoft recently announced a multi-year partnership with AMD that includes plans for “future Xbox consoles.” Conversely, Sony, lacking the extensive ecosystem available to Microsoft through Windows, recently reiterated its commitment to dedicated consoles, especially given the PS5’s sales of around 78 million units. Additionally, rumors about a Switch 2 have emerged, with the latest model surpassing 3.5 million units sold within its first four days.
In conclusion, I don’t anticipate devoted gaming consoles disappearing anytime soon. They remain more cost-effective than assembling and maintaining a gaming PC while providing a more stable gaming experience than streaming alternatives. After a five-year stretch that prioritized digital access and streaming ownership, game consoles continue to be cherished objects, evoking nostalgia along with being functional. It might seem unreasonable to cling to a bundle of plastic and circuitry, yet when that apparatus resembles the Mega Drive, Neo Geo, or PlayStation 5, it transforms into more than a mere device—it becomes a part of our entertainment culture.
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Modern disk galaxies frequently display distinct thin and thick disks. The mechanisms driving the formation of these two discs and the timeline of their emergence are still unanswered questions. To investigate these issues, astronomers examined various epochs (statistical samples of 111 edge-on disk galaxies dating back up to 11 billion years, or approximately 2.8 billion years post-Big Bang) utilizing archived data from the NASA/ESA/CSA James Webb Space Telescope.
Webb/nircam composite images of a quarter of the team’s samples were sorted by increasing redshift. Image credit: Tsukui et al., doi: 10.1093/mnras/staf604.
Present-day disk galaxies often comprise extensive, star-rich outer disks alongside thin, star-like disks.
For instance, the thick discs of the Milky Way reach approximately 3,000 light-years in height, while the thin discs are roughly 1,000 light-years thick.
But what mechanisms lead to the formation of this dual disk structure?
“The thickness of high redshift discs, or unique measurements from the early universe, serve as benchmarks for theoretical research that can only be conducted using Webb,” states Takagi, an astronomer at the Australian National University.
“Typically, older, thicker disk stars are dim, while the younger, thinner disk stars dominate the galaxy.”
“However, Webb’s exceptional resolution allows us to observe and highlight faint older stars, enabling us to distinguish between two disk structures in a galaxy and measure their thickness separately.”
Through an analysis of 111 edge-on targets over cosmological time, astronomers studied both single-disc and double-disc galaxies.
The findings indicate that galaxies initially form a thick disk, which is followed by the formation of a thin disk.
The timing of this process is contingent on the galaxy’s mass: high-mass, single-disk galaxies transitioned to two-disk structures around 8 billion years ago.
In contrast, a thin disk emerged about 4 billion years ago within low-mass, single-disk galaxies.
“This is the first time we’ve resolved a thin star disk at such a high redshift,” remarked Dr. Emily Wysnioski from the Australian National University.
“The novelty becomes evident when observing the onset of thin star disks.”
“It was astonishing to witness a thin star disk from 8 billion years ago, and even further back.”
To elucidate the transition from a single thick disk to a dual-disk structure, as well as the timing differences between high-mass and low-mass galaxies, researchers expanded their investigation beyond the initial edge-on-galaxy samples. They examined data showing the movement of gases from large millimeter/sub-millimeter arrays (ALMAs) in Atacama and ground surveys.
By considering the movement of the galaxy’s gas disks, they found their results aligned with the “turbulent gas disk” scenario.
In this framework, the turbulent gas disks of the early universe catalyze intense star formation, leading to the creation of thick star disks.
As stars form, they stabilize the gas disks, diminishing turbulence and consequently resulting in thinner disks.
Larger galaxies can convert gas into stars more efficiently and thus calm down more quickly than their lower-mass counterparts, leading to the formation of the earlier thin disk.
“This study delineates structural differences between thin and thick discs, but we aim to explore further,” Dr. Tsukui mentioned.
“We look to incorporate the types of information typically acquired from nearby galaxies, such as stellar movement, age, and metallicity.”
“By doing so, we can bridge insights from both nearby and distant galaxies, enhancing our understanding of disk formation.”
Survey results were published in Monthly Notices of the Royal Astronomical Society.
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Takagi Tsukui et al. 2025. The emergence of thin and thick discs of galaxies across the history of the universe. mnras 540(4): 3493-3522; doi: 10.1093/mnras/staf604
Influence of Uterine Hormones on Human Brain Development
Peter Dazeley/Getty Images
The human brain stands as one of the universe’s most intricate structures, potentially shaped by the surge of hormones released by the placenta during pregnancy.
Numerous theories have emerged regarding the evolution of the human brain, yet it remains one of science’s greatest enigmas. The social brain hypothesis posits that our expansive brains evolved to navigate complicated social interactions. This suggests that managing dynamics in larger groups necessitates enhanced cognitive abilities, and that species with strong social inclinations require increased brain development. Comparable highly social animals, like dolphins and elephants, possess significant brain sizes too; however, the biological mechanisms linking these features are still unclear.
Recently, Alex Tsompanidis from Cambridge University and his team propose that a placental sex hormone might be the key. The placenta, a temporary organ bridging the fetus and the mother, releases hormones crucial for fetal development, including sex hormones like estrogens and androgens.
“It may sound like a stretch, linking human evolution to the placenta,” notes Tsompanidis. “However, we’ve observed fluctuations in these hormone levels in utero and predicted outcomes regarding language and social development, among other areas.”
Recent studies indicate these hormones significantly impact brain development. For instance, a 2022 study revealed that administering androgens like testosterone to brain organoids—a simplified brain model derived from human stem cells—during crucial developmental stages led to an increased number of cortical cells and expansion in regions vital for memory and cognition. Other investigations involving brain organoids have highlighted the importance of estrogens in forming and solidifying neural connections.
Limited evidence suggests that humans experience greater exposure to these hormones during pregnancy compared to non-human primates. A 1983 study indicated that gorillas and chimpanzees excrete 4-5 times less estrogen than pregnant humans. Additionally, human placentas exhibit greater gene activity associated with aromatase—an enzyme converting androgens to estrogens—compared to macaques.
“These hormones appear crucial for brain development. Evidence indicates significantly elevated levels in humans, especially during pregnancy,” asserts Tsompanidis.
This influx of hormones may also clarify why humans form larger social networks. Some evolutionary biologists theorize that differences between sexes are subtler in humans than in other primates, fostering broader social connections. For instance, men and women exhibit greater size similarity in comparison to male and female Neanderthals, suggests Tsompanidis, likely a result of elevated estrogen levels in utero.
“High estrogen levels not only reduce masculinization but may also foster a more interconnected brain,” Tsompanidis explains. “Thus, the drive to elevate estrogen levels promotes social cohesion and interconnectedness, integral to human brain development.”
David Geary from the University of Missouri agrees that placental genes influence human brain development and its evolutionary path. However, he believes the significance of male-male competition in brain and cognitive evolution is often underestimated.
He notes that human males within the same groups tend to exhibit more coordination and less aggression compared to other primates—a trait that may have evolved due to intergroup conflicts. Enhanced teamwork and coordination could significantly benefit survival during life-threatening confrontations.
Our understanding of placental differences among primates remains limited. Many non-human primates, such as chimpanzees, consume their placenta post-birth, complicating research efforts, as Tsompanidis highlights.
Unraveling the factors that influenced human brain evolution is not merely an academic endeavor; it also brings insights into human nature.
“Not every human possesses extensive social or linguistic skills, and that’s perfectly acceptable—these traits don’t define humanity,” Tsompanidis remarks. Understanding the brain’s evolutionary journey can illuminate whether certain cognitive attributes come with trade-offs.
RNA is believed to have been crucial in the initiation of life
Shutterstock/nobeastsofierce
The quest to decipher how dormant molecules might have sparked life brings researchers closer to their goal. A team has developed a method using partially replicable RNA molecules, suggesting that genuine self-replication could eventually be achieved.
RNA is a pivotal molecule in the discussion of life’s origins, as it can store information like DNA and catalyze reactions akin to proteins. While neither function is perfect on its own, the dual capability has led many scientists to theorize that life originated with self-replicating RNA molecules. “This was the molecule that governed biology,” says James Atwater from University College London.
Nonetheless, engineering self-replicating RNA molecules is a challenging task. RNA can form double helices similar to DNA, which can also be copied in a similar manner. By separating the two helices and adding RNA nucleotides to each strand, one could theoretically produce two identical helices. However, the binding between RNA strands is so strong that it complicates their separation for replication.
Recently, Attwater and his team found that a trio of RNA nucleotides (triplets) can be tightly bonded, preventing the strands from re-zipping. “Three is the sweet spot,” Attwater elaborates, noting that longer combinations are prone to errors. Thus, in their methodology, the team mixed RNA enzyme double helices with the triplet sequences.
By acidifying the solution and heating it to 80°C (176°F), the helices can be separated to allow for triplet pairing. When the solution is then made alkaline and cooled to -7°C (19°F), the highly concentrated liquid remaining as water freezes activates the RNA enzymes, which then bind the triplets together to form new strands.
Currently, researchers have succeeded in replicating RNA enzymes of up to 30 nucleotides in length from an original strand of 180 nucleotides. They believe that enhancing enzyme efficiency could lead to full replication.
Attwater highlights that this “very simple molecular system” possesses intriguing characteristics. One is the potential correlation between triplet RNA sequences and the triplet code that dictates protein sequences in modern cells. “There may be a connection between the biological mechanisms employed for RNA replication and the way RNA is utilized in present-day biology,” he explains.
Additionally, the team has identified that the triplet sequences most likely to facilitate replication exhibit the strongest bonding. This suggests that the earliest genetic code may have consisted of this set of triplets, which adds another layer of interest.
Researchers contend that the conditions required to support this process might naturally occur. Given the need for freshwater, it’s likely that such processes transpired on land within geothermal systems.
“The materials we see today can be found on Earth. Icelandic hot springs display a mixed pH, similar to what we use,” Attwater notes.
“RNA nucleotide triplets convey highly specific functional information in every cell,” remarks Zachary Adam from the University of Wisconsin-Madison. “This research is captivating as it may indicate a purely chemical role (rather than informational) for RNA nucleotide triplets that could predate the emergence of living cells.”
This discovery implies that the first animals began emerging from the oceans around 400 million years ago and adapted to terrestrial life much quicker than previously thought.
Stuart Smida, a paleontologist from California State University, remarked, “I believed the transition from fins to limbs took more time.”
Before this, the oldest known reptile footprints were found in Canada and dated to 318 million years ago.
The ancient footprints were uncovered in sandstone slabs near Melbourne, revealing reptile-like feet with elongated toes and claws.
Scientists estimate that the creature was about 2.5 feet long (80 cm) and might resemble a modern monitor lizard. These findings were published on Wednesday in the journal Nature.
Co-authors and paleontologists, including Arlberg from Uppsala University in Sweden, indicated that the evidence showcases the identification of nails surrounding the footprint.
“It’s a walking animal,” he stated.
Located near Melbourne, Australia, sandstone slabs reveal fossil footprints of reptile-like creatures that roamed approximately 350 million years ago. The footprint is highlighted in yellow (front paw) and blue (back paw), indicating the movement of three similar animals, according to the researchers. Grzegorz Niedzwiedzki / Prof. Per Per Erik Ahlberg via AP
Only animals that evolved to live entirely on land developed the claws seen in these fossils. Earlier vertebrates, such as fish and amphibians, did not have hard claws and depended on aquatic environments for laying eggs.
In contrast, branches of the evolutionary tree leading to modern reptiles, birds, and mammals, known as amniotes, developed feet equipped with claws suited for traversing dry ground.
Smida commented, “This is the earliest evidence we’ve encountered of animals with claws.”
During the time these ancient reptiles existed, the environment was warm and humid, with expansive forests beginning to take shape. Australia was then part of the supercontinent Gondwana.
The fossil footprints tell a story of a day in the life, Ahlberg explained. A reptile fled across the ground before light rain; some rain droplets lightly obscured the tracks. Subsequently, two more reptiles dashed in opposing directions before the ground hardened and became covered with sediment.
Co-author John Long, a paleontologist at Flinders University in Australia, stated:
hWelcome to the depths of intricate turmoil and long-standing waves. A peace agreement is being negotiated in the Democratic Republic of the Congo this week after three months of intense conflict. I spoke with East Africa correspondent Carlos Mureicz about the situation, its rapid escalation, and the prospects for peace.
Echoes of the 90s
Flag Bearer… individuals will expand the monument during an anti-government demonstration in Bukabu in February. Photo: Luis Tato/AFP/Getty Images
In late January, in a swift and shocking turn of events, the M23 militia group captured Goma, one of the largest cities in the Democratic Republic of the Congo. Weeks later, these rebels took control of Bukabu, another strategically important city, successfully repelling attempts by Congolese troops to halt their advance. The M23’s rapid mobilization and territorial gains are rooted in decades of political and economic strife.
Carlos highlights that the conflict’s origins trace back to the 1994 genocide in Rwanda. Millions of refugees have crossed from Rwanda into the DRC, with Hutu and Tutsi factions still driven by ethnic narratives.
The M23 is primarily led by Tutsi, an ethnic group that has taken up arms over a decade ago and faced numerous skirmishes since. Their military actions are justified as necessary to protect minority communities from ongoing threats and marginalization, given that hundreds of thousands of Tutsi were slaughtered during the genocide by Hutu extremists.
Carlos notes that despite the longstanding conflict, the M23’s advances this year signify a new level of intensity, having made significant territorial gains in a remarkably short period. “This year, [the fighting is] the worst we’ve encountered.”
Conflict Minerals
Heavy Metal… the DRC is the leading producer of cobalt, accounting for over 70% of global production last year. Photo: Junior Kanna/AFP/Getty Images
The M23’s advancements represent a grave infringement on the sovereignty of the DRC, a situation exacerbated by the Rwandan government’s support for the rebel group. “Rwanda denies any involvement; however, according to the United Nations and the international community, Rwanda is financially backing the M23,” Carlos pointed out. The Rwandan government claims its assistance is limited to “protecting targeted Tutsis from genocide,” Carlos added.
However, local experts suggest that Rwanda has heavily invested in maintaining proxy control over parts of the DRC, driven not only by overlapping ethnic groups but also by the rich natural resources the DRC possesses. Often referred to as conflict minerals, these resources have fueled avarice and perpetuated military strife in Eastern and Southern DRC.
It is noteworthy that these regions are seldom discussed in light of their extraordinary beauty, showcasing unique landscapes of stunning red and orange hills, lakes, and fertile soil. Caught in the crossfire of political and economic aspirations, the area has become a battleground for ethnic and commercial conflicts. While the tensions initially stemmed from community disputes, minerals have since played a crucial role, according to Carlos.
These minerals are extremely abundant in the DRC; essential in modern technology. Cobalt, lithium, and coltan are vital components for lithium-ion batteries used in smartphones, laptops, and electric vehicles. The DRC accounts for an astonishing 60-70% of the global supply of these minerals. Carlos emphasizes the extensive resources being allocated for the capture and trade of these natural riches.
A Surge of Violence
Uprooted… individuals fleeing the conflict arrive by handmade boats near Minova, South Kivu province of DRC. Photo: Alexis Huguet/AFP/Getty Images
“Rapid and brutal” is how Carlos describes the events of recent months. He underscores that this is merely the latest chapter in the ongoing strife, which has resulted in one of the world’s largest humanitarian crises. Since 1996, the conflict has led to over 6 million fatalities and displaced a similar number of individuals both within and outside the DRC.
In March, Carlos visited Sibi Talk in Burundi, DRC’s neighbor and a primary destination for refugees fleeing the violence. Those who escaped shared “truly horrifying experiences.”
As the M23 advanced through southeastern DRC, refugees witnessed numerous Congolese soldiers deserting. Carlos remarked: “To illustrate the dire situation, these soldiers told civilians, ‘We are fleeing from the M23. We are outmatched. You should consider leaving this town if you can.’
Those who managed to escape, carrying whatever they could, reached the Burundi border, navigating a perilous river along the way. “The Congolese army appeared utterly powerless. It was a desperate situation.”
Eastern DRC – Remote Regions of a Vast Country
The sunsets of Bulambo, DRC… the shadows of warfare loom in a nation celebrated for its diverse wildlife and landscapes. Photo: Pietro Olivetta/Getty Images/500px
A unique aspect of the DRC conflict is its localization, which may partly explain the tepid response from the Army and local security forces. The capital, Kinshasa, feels worlds apart from Goma, situated a 47-hour drive and ferry journey away. Refugees shared a common sentiment: they attributed their plight to the government, feeling that Kinshasa has neglected the Eastern DRC.
The government operates in the region, comprised of numerous political factions that exploit mineral resources and allocate contracts to foreign companies. Carlos states that many believe that as long as politicians can continue profiting from the region, conflict will persist.
The Prospect of Peace
Peace Process… Qatar’s chief speaks with the Rwandan president (left) and his Congolese counterpart in Doha last month. Photo: Mofa Qatar/AFP/Getty Images
This situation may be shifting, as the M23’s advances pose a threat to the stability of Kinshasa. Carlos mentioned that just weeks ago, the warring parties were inclined to engage in dialogue. Initial discussions held in Doha yielded promises from both sides to produce a preliminary peace agreement. The Trump administration has also shown interest, expressing a strong desire to sponsor peace negotiations.
According to Carlos, these discussions are among the most hopeful in recent times. While an end to hostilities is urgently needed and welcomed, a fragile resolution is only achievable if it doesn’t revert to current chaos. The key to durable peace lies in lifting the DRC out of its historical and geographical entanglements.
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Malus is a genus comprising over 35 species that thrive in the temperate Northern Hemisphere, spanning regions from East Asia to Europe and North America. This genus includes the cultivated apple, Malus domestica, along with its wild relatives. Recent research has unveiled the evolutionary connections among Malus species and traced their genetic development over the past 60 million years.
Malus evolutionary landscape informed by phylogenetics. Image credits: Li et al., doi: 10.1038/s41588-025-02166-6.
“There are around 35 species within the Malus genus; however, despite the significance of apples as a fruit crop, comprehensive research on the evolution of this group’s genome has been lacking.”
“This study provided insights into the Malus genome, established the apple family tree, documented genomic events including whole-genome overlap and hybridization among species, and identified genomic regions linked to specific traits, such as resistance to apple scab disease.”
Professor Ma and his team compiled the genomes of 30 species by sequencing their DNA, focusing on the Malus genus known for its delicious golden apple varieties.
Among the 30 species, 20 are diploid, meaning they possess two chromosome copies per set, similar to humans, while 10 are polyploid, indicating they have three or four chromosome copies, likely resulting from recent hybridization with diploid relatives of Malus.
By scrutinizing nearly 1,000 gene sequences across these species, researchers constructed a phylogenetic tree for the genus and employed biogeographical analysis to trace its origins back to Asia approximately 56 million years ago.
“The evolutionary narrative of the genus is intricate, showcasing numerous instances of hybridization among species and shared whole-genome events that complicate comparisons,” stated Professor Ma.
“Access to high-quality genomes for a large number of species within the genus has enabled us to explore how Malus evolved and the interrelationships among these species.”
Further research into the evolutionary history of Malus genomes utilized analytical techniques called pan-genomics.
This methodology encompasses a thorough comparison of conserved genes and so-called ‘jumping genes’ that can move within the genome across the 30 species, along with genes found only in a subset of the genomes.
The analysis of pan-gene dynamics benefited greatly from the use of a pangenome graph tool, which amalgamates genomic data from closely related groups to elucidate evolutionary conservation and divergence.
“Utilizing 30 pangenomes significantly aided in identifying structural variations, gene duplications, and rearrangements among species that could have been missed with fewer genome comparisons,” remarked Professor Ma.
“Notably, one structural variant uncovered allowed us to pinpoint genomic segments related to apple scab resistance, a fungal disease impacting apples globally.”
The researchers also developed a pangenome analysis tool designed to detect evidence of selective sweeps, a process whereby advantageous traits rapidly increase in frequency within a population.
With this approach, they pinpointed genomic regions linked to cold and disease resistance in wild Malus species, which might also correlate with undesirable fruit taste.
“Attempts to cultivate the best flavor in fruit may have inadvertently diminished the hardiness of cultivated apple varieties,” noted Professor Ma.
Understanding structural variations in Malus, including hybridization histories, interspecies relationships, and pangenomic insights can inform future breeding strategies aimed at retaining both flavor and disease-resistant traits in apples.
W. Li et al. Pangenome analysis reveals evolution and diversity in Malus. Nat Genet. Published online on April 16th, 2025. doi:10.1038/s41588-025-02166-6
Four decades ago, a 4-drawer filing cabinet was necessary to house 10,000 documents. Now, it only requires 736 floppy disks to hold the same volume of files. The cloud allows for the storage of 10,000 documents without occupying physical space.
With the evolution of data storage comes a transformation in the information landscape. This evolution poses challenges related to the storage, transfer, and proper utilization of individuals’ personal data.
The Information Commissioner’s Office (ICO) organized an exhibition at the Manchester Central Library this week, showcasing 40 items that demonstrate the evolution of data privacy. Each item illustrates how access to information has changed over the past four decades and how data has become pivotal in major news events.
John Edwards, a member of the intelligence committee, expressed his appreciation for the exhibition, emphasizing the importance of human influence in data-related matters. He highlighted the significance of understanding terms like data controller, data processor, and data subject.
The exhibition features various items, including Pokemon toys, floppy disks, Tesco Club cards, modems, Millennium bug brochures, soccer shirts, and Covid vaccination cards. It also showcases how ICO interventions have brought about societal changes, such as ending the construction industry’s “employment denial list” and implementing public food hygiene assessments for restaurants.
One of Edwards’ favorite exhibition items is the spiked lawn aerator shoes, symbolizing an early enforcement action in the 1980s against a company selling customer information obtained from shoe sales.
My favourite item at the exhibition by Intelligent John Edwards is the spiked grass aerator shoes. Photo: Christopher Tormond/The Guardian
The 40th pedestal at the exhibition remains unused, inviting the public to suggest objects that have influenced the data landscape. Edwards emphasized the personal and subjective nature of privacy, stating that each individual has unique expectations and experiences.
The ICO was founded as a UK data protection regulator near Manchester 40 years ago and now oversees new data protection laws. The regulatory landscape has undergone significant transformations since its inception.
NHS Covid Vaccination Card. Photo: Andy Rain/EPA
According to Edwards, individuals now have a significantly larger amount of personal data worldwide compared to when the ICO was established. The constant flow of data worldwide illustrates the extensive data environment we now exist in.
Edwards highlighted the challenge of keeping pace with the rapid changes in technology and data usage. The ICO regulates a wide range of entities, from small schools and GP surgeries to large social media companies, requiring continuous adaptation to address privacy implications.
Reflecting on the future, Edwards acknowledged the uncertain geopolitical landscape, emphasizing the potential impact of quantum computing and advanced AI technologies on data handling and privacy in the coming years.
Ralph Hollogay, a pioneering anthropologist who emphasized the importance of changes in brain structure in human evolution, passed away on March 12th at his Manhattan home at the age of 90.
His death was announced by the School of Anthropology at Columbia University, where he had been a professor for nearly 50 years.
Holloway’s theory challenged the notion that brain size alone distinguished humans from apes and early ancestors, highlighting the significance of brain organization.
Although no brains from millions of years ago exist, Dr. Holloway focused on creating fossil skull endocasts from latex to overcome this limitation.
In a 2008 paper, he detailed how he obtained information from these casts, providing insight into brain structure by examining the outer edges of the brain.
Using endocasts, Dr. Holloway concluded that the fossil skulls from South Africa’s Town’s Children quarry belonged to early human ancestors, supporting Raymond Dart’s controversial discovery.
His meticulous research included studying natural endocasts found in the quarry to validate his conclusions, emphasizing the importance of independent investigation in scientific discovery.
Dr. Holloway’s focus on the Lunath groove behind the endocast provided evidence that aligned with human brain positioning, confirming the accuracy of Dr. Dart’s initial findings.
The contentious debate surrounding the Town’s Children’s findings has subsided, with Dr. Holloway’s and Dr. Dart’s conclusions about the Lunate Sulcus now widely accepted in the scientific community.
Dr. Holloway’s emphasis on brain structure over volume played a pivotal role in validating human ancestry, highlighting the significance of reorganization in evolutionary development.
Throughout his career, Dr. Holloway’s dedication to studying brain evolution through three-dimensional modeling remained unwavering, emphasizing the importance of understanding the human brain’s journey to its current complexity.
His contributions, such as his work on TaungChild, continue to shape our understanding of human origins and evolution.
Dr. Holloway’s legacy extends beyond his scientific achievements, as he leaves behind a lasting impact on the field of anthropology and evolutionary studies.
His commitment to rigorous research, innovative methods, and interdisciplinary collaboration sets a standard for future generations of scientists.
Dr. Hollogay’s contributions will continue to inspire and guide anthropologists, researchers, and educators in their quest to unravel the mysteries of human evolution.
His impact will be felt for generations to come, shaping the future of evolutionary studies and advancing our understanding of human origins.
Ralph Hollogay’s legacy lives on through his groundbreaking research and profound influence on the field of anthropology.
His work continues to shape our understanding of human evolution and the complexities of brain development.
This supernova event may have occurred at the Upper Centaurus Lupus Society. This is a group of giant stars about 457 light years away from Earth.
Illustration of an exoplanet like Earth after X-ray radiation exposure. Image credit: NASA/CXC/M. Weiss.
Life on Earth is constantly evolving under continuous exposure to ionizing radiation from both terrestrial and cosmic origins.
The radioactivity in the bedrock gradually decreases over timescales of billions of years, but the level of cosmic radiation fluctuates as the solar system moves through the Milky Way.
Nearby supernova activity could increase the level of radiation on the Earth’s surface by several orders of magnitude, which is expected to have a major impact on the evolution of life.
In particular, radiation levels improve as the solar system passes near a large group of stars known as the OB Association.
The winds associated with these large star factories are expected to inflate the super bubbles of high temperature plasma first. This could be the birthplace of most of the Core Collapse explosions taking place within the AB Association.
The solar system entered such a super bubble, commonly known as the local bubble, about 6 million years ago, and is now close to its centre.
“The Earth entered the local bubble and passed its stardust-rich appearance about 6.5 million years ago, sowing the planet with old iron 60, the radioactive iron of iron produced by the exploding stars. did it,” astronomer Santa Cruz, and colleagues at the University of California.
“Then, 20-3 million years ago, one of our neighboring stars exploded with incredible force, providing another cohort of radioactive iron to the planet.”
When Nojiri and her co-authors simulated what the supernova looked like, they discovered that it hammered the Earth with cosmic rays for 100,000 years of explosion.
This model perfectly described previously recorded spikes of radiation that shocked the Earth around that time.
“We’ve seen from other papers that radiation can damage DNA,” Nojiri said.
“It could be an evolutionary change in the cell or an accelerated mutation.”
Meanwhile, the author came across research into viral diversity in one of the Rift Valley Lakes in Africa.
“I can’t say they’re connected, but there are similar time frames,” Nojiri said.
“We found it interesting that the virus’s diversification is increasing.”
study It was published in Astrophysics Journal Letter.
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Caitlyn Nojiri et al. 2025. Bubble Life: How nearby supernova left short-lived marks on the cosmic ray spectrum, leaving an indelible trace of life. apjl 979, L18; doi: 10.3847/2041-8213/ADA27A
Excavated in southeastern China, fossils of Jurassic birds are said to have a significant impact on the history of bird evolution, according to researchers.
The recently discovered Baminolis Zengensis, a bird the size of a quail, flew in the skies approximately 150 million years ago during the Jurassic period. A study about it was published on Wednesday in the Nature Journal. In essence, it is one of the oldest known birds to humanity, alongside the iconic Archeopteryx found in Germany in 1862 and of a similar age.
“For over 150 years, Archeopteryx has stood alone,” said Steve Bursatte, a paleontologist at the University of Edinburgh. Further explanation on the research accompanied this statement.
“All this time, it has remained as the sole unsuspecting bird fossil from the Jurassic era,” he mentioned to NBC News via email.
While other bird-like Jurassic fossils were found, there was a “significant mystery and frustrating gap” in the fossil record, according to Bursatte. So, where were their fossils?
The 2023 discovery of Baminornis in Zhenghe County, Fujian Province, China, filled that gap and became one of the most important discoveries since Archeopteryx, labeling it as “the second unsuspecting bird from the Jurassic era.”
Unlike the half-bird, half-reptile that had a long, thin tail resembling a velociraptor, Baminonis had a short tail where some vertebrae fused into short, sturdy nubins pushing the body center towards the wings, similar to modern birds for better flying.
Until the discovery of Baminoris, short tails were only found in birds known to have lived around 20 million years later, such as Eoconfuciusornis and Protopteryx.
Brusatte expressed excitement that Baminoris was more advanced than Archeopteryx and could fly much better.
Baminornis was more anatomically complex than Archeopteryx, being a “primitive” bird with claws and sharp teeth resembling dinosaur ancestors.
The discovery of two similarly aged birds about 5,500 miles apart led the nature research team to believe that bird evolution took place millions of years earlier than previously thought.
In addition to dozens of fossils of aquatic or semi-aquatic animals, the Zhenghe Fauna collection included at least three Aviaran fossils, enriching the understanding of early diversification and filling important gaps in the evolutionary history of terrestrial ecosystems towards the end of the Jurassic era according to researchers.
Baminornis fossils preserved most of the skeleton, but the wings were not preserved, leaving questions about their size and wing structure. The lack of a skull also limits clues regarding their diet.
Nevertheless, Baminornis suggests that various birds lived during the Jurassic period and flew in different ways,” Brusatte said.
Paleontologists have excavated fossilized remains of two Jurassic bird species in the area of Zenge County, Fujian Province, southeastern China. These 149 million-year-old fossils exhibit early appearances of highly derived bird characteristics, and together with fossils of another bird from the same region, they have the early origins of the birds and the early Jurassic. It suggests bird radiation.
“Birds are the most diverse group of terrestrial vertebrates,” says Professor Min Wang. Paleontology and Paleontology of Vertebrates The Chinese Academy of Sciences and colleagues said in a statement.
“Specific macroevolutionary studies suggest that their early diversification dates back to the Jurassic period.”
“However, the earliest evolutionary history of birds has long been obscure by highly fragmented fossil records. Archeopteryx Being the only widely accepted Jurassic bird. ”
“nevertheless Archeopteryx It was closely similar, especially due to its distinctive long reptile tail, as it had feathered wings. This is in stark contrast to the short-tailed morphology of modern and Cretaceous birds. ”
“Recent research questions about Aviaran's status. Archeopteryx classifies it as a deinonychosaurian dinosaur, a sister group of birds. ”
“This raises the question of whether there is a clear record of Jurassic birds.”
In their new study, Professor Wang and co-authors discovered and investigated two early bird fossils that were part of the so-called Zhenghe Biota.
One of these birds named Baminornis Zhenghensis the earliest known short-tailed bird.
“Baminornis Zhenghensis The end of the short tail in a complex bone called Pygostyle is a characteristic that can also be observed in living birds,” the paleontologist said.
“Previously, the oldest record of short-tailed birds was from the early Cretaceous period.”
“Baminornis Zhenghensis It is the only Jurassic and the oldest short-tailed bird ever discovered, pushing back the appearance of this derivative bird's distinctive features for nearly 20 million years. ”
According to the team, Baminornis Zhenghensis It also represents one of the oldest known birds.
“A step back and reconsidering the uncertainty of the phylogenetics Archeopteryx we don’t doubt it Baminornis Zhenghensis said Dr. Zhonghe Zhou of the Institute for Vertebrate Paleontology and Paleontology at the Chinese Academy of Sciences.
The second unnamed bird is represented by a single fossilized fullcula (wishbone).
“Our results support this introduction to Furcula ornithuromorpha a diverse group of Cretaceous birds,” the researchers said.
Team's work It was published in the journal today Nature.
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R. Chen et al. 2025. The first short-tailed bird from the late late Jurassic period in China. Nature 638, 441-448; doi:10.1038/s41586-024-08410-z
Today, clothes are the means of self -expression and group identity, and we will not go without them.
Photo of Martin Parr/Magnum
Venus figurines are most famous for their sexual characteristics. These frequently pronounced sculptures of women’s forms made about 30,000 years to 20,000 years ago have been interpreted as a ritual rich Ility, the mother of the mother, and the self -portrait. Like a fashion plate, one of them is not generally seen. However, some of them can get a glimpse of the appetite, which is worn by a good-looking stone-oriented woman. One of Russian Kostenki is equipped with a strap-style robe. Others have stringed instruments. And the famous Venus of Willendorf is wearing a woven hat, but it is a very wonderful hat.
These statues are far from our general concepts in the past, covered with animal fur. According to archeologists, the gorgeous details with their clothes are the importance of clothing tens of thousands of years ago and hundreds of thousands of years ago. Olga sofaProfessor Emerita from the University of Illinois University of Urbanhamping. It started as needed and turned into a canvas for aesthetic expressions and meanings to keep people warm. Now, the story of how it happened was added, thanks to some new discoveries.
Clothing is easy to rot, and the oldest archeological site is only around 10,000 years old。 However, as the Venus figurine shows, we can follow the time dating in other ways. These archeological clues have revealed the origin of both simple cape and complex tailoring. largely…
If dinosaurs really did appear near the equator, life would have been particularly hot and dry.
Mark Whitton/Natural History Museum Trustees
Dinosaurs may have first evolved near the equator, rather than far south in the Southern Hemisphere as previously thought. Modeling studies suggest they originated in areas covering what is now the Amazon rainforest, the Congo Basin, and the Sahara Desert.
“Given the gaps in the fossil record and the evolutionary tree of dinosaurs, it is very likely that this is the central point of dinosaur origin,” he says. Joel Heath At University College London.
Dinosaurs evolved during the Triassic period, which lasted from 252 million to 201 million years ago, but there is “considerable” uncertainty about when and where they evolved, Heath said. The oldest known fossils of these animals are about 230 million years old, but there are enough features to suggest that dinosaurs have already been around for millions of years. “There must have been a lot going on in terms of dinosaur evolution, but we don't have the fossils,” he says.
At this time, the Earth looked very different. All the continents were combined into a single supercontinent called Pangea, shaped like a C with its center straddling the equator. South America and Africa were located in this southern hemisphere part and were fitted together like pieces of a jigsaw puzzle. The earliest known dinosaurs lived in the southern parts of these two continents, in present-day Argentina and Zimbabwe, where dinosaurs were thought to have originated.
To learn more, Heath and his colleagues built a computer model that works backwards in time from the oldest known dinosaurs to the group's origins. They considered uncertainties such as gaps in the fossil record, possible geographic barriers, and ongoing questions about how the earliest dinosaurs were related to each other to create dozens of versions. has been created.
Most of these simulations concluded that dinosaurs first appeared near the equator, with only a few supporting a southern origin.
Paleontologists have tended to believe that dinosaurs couldn't have originated near the equator, Heath said. One reason for this is that no early dinosaur fossils have been found in the area. Moreover, it was a difficult place to live. “It was very, very dry and very hot,” he says. “It is believed that dinosaurs could not have survived in such conditions.”
However, most models do not. “This suggests something that we didn't really think was possible until now,” Heath says.
In fact, there may be a more prosaic explanation for the lack of early dinosaur fossils found near the equator. Paleontologists tend to conduct excavations in North America, Europe, and more recently China. “There are many areas of the planet that are completely ignored,” says Heath. He added that geologists have not found many rocks of suitable age in the area associated with the findings that can be excavated. “It may not be exposed in a way that we can easily investigate.”
But evidence supporting Heath's idea has recently come to light. On January 8th, researchers david loveless At the University of Wisconsin-Madison, oldest known dinosaur Originally from northern Pangea. They discovered what they call a species new to science. Avaitum Banduiche, sauropodomorphs related to long-necked dinosaurs such as diplodocus That evolved later. The research team discovered the 230-million-year-old rock in Wyoming's Popo Aggie Formation.
If dinosaurs were already present north and south of Pangea that long ago, there's no way the middle of the equator would be closed off to them, Heath said. “They must have been crossing the area.”
CRisti Thomas called 911 for the second time on a warm October day, but when she couldn’t get through, she began to panic. She watched anxiously as a plume of black smoke grew over a rural community in central California.
Just then, I heard a familiar ping.
Watch Duty, an app that warns users of the risk of wildfires and provides critical information in the event of a fire, was already recording the fires. She relaxed. The cavalry was coming.
“I can’t describe the sigh of relief,” she said, recalling the moments after sirens wailed through her neighborhood and helicopters roared overhead. “We saw it happen, so we had questions, and the oversight mandate answered them all.”
Thomas is one of the millions of Watch Duty evangelists who have helped the app spread rapidly. This organization has only been in existence for three years. Currently boasts up to 7.2 million active users At peak times, it receives up to 512 million page views. For a nonprofit organization run mostly by volunteers, those numbers are impressive even by startup standards. But they are not surprising.
Lookout duties have changed the lives of people in fire-prone areas. When the skies darken and ash fills the air, users no longer have to scramble for information, they can now rely on the app to get fast, accurate information for free.
Provides access to critical information about where the danger is, including fire perimeters, evacuation areas, and evacuation location maps. Users can find wildfire camera feeds, track aircraft locations, and see wind data all in one place. The app can also help identify when there is little need for alarm, when risks have subsided, and which agencies are active on the ground.
“This app isn’t just about alerts, it’s about your state of mind,” said Watch Duty CEO John Mills. The Silicon Valley alumnus founded the organization after moving from San Francisco to a large, fire-prone ranch in Sonoma County. After starting in just four California counties, Watch Duty covered the entire state in its first year and quickly expanded from the American West to Hawaii.
As the community grows to reach people in 14 states by 2024, Mills says new features and improved accuracy have made it more popular and filled an unmet need.
It’s not just residents who have become reliant on apps in recent years. A variety of responders, from firefighters to city officials to journalists, are also logging on to ensure key stakeholders are on the same page.
“People thank me for on-duty duty, but I’m like, ‘You’re welcome, I’m sorry you need it,'” Mills said. But it’s clear that the need is real. In each new area we served, word of mouth drove adoption.
“We didn’t spend any money on marketing,” Mills said. “To let the world know that we just let the genie out of the bottle and things are not going back to the way they were.”
CalFire supervisors watch over the Rhine Fire in San Bernardino County, California, in September 2024. Photo: Jon Putman/Sopa Images/Rex/Shutterstock
You’ll never know who spoke the first sentence or what they said, but you can have fun guessing. Perhaps they came from the mouths of Stone Age men who wanted to defeat their rivals and win the affections of young women. He may have crept up to his girlfriend, surreptitiously pointing at his competitors and whispering words in her ear that translated into English to mean “fuck you.”
Is it ridiculous? Not so, if we are guided by the work of linguist Liljana Progovac. She points out that Charles Darwin described language as “half art, half instinct,” but most who study the evolution of language have ignored the creative element. Her research addresses this issue by focusing on the wordplay involved in compound words such as shit-head, skin-flint, and lily-livered, many of which are now written as single words. I’m starting to fix it. She believes these are language fossils that point to a key stage in the evolution of language, the moment when humans realized they could string two words together to create very short sentences.
Moreover, after collecting examples of such phrases, Progovac noticed that they had something surprising in common. “They’re usually dismissive,” she says. And there may be evolutionary reasons for that.
Language is central to the human experience, but its ancient roots are difficult to study because it leaves no archaeological trace, at least until the invention of writing. Nevertheless, judging by the communication systems of other animals, our ancestors could use simple sounds and…
New research led by scientists at the University of Bristol shows how lepidosaurs, the most diverse clade of quadrupeds that includes lizards and snakes, evolved an astonishing variety of jaw shapes and He revealed what has brought him extraordinary success.
The rate of evolution of lepidosaur jaw morphology. Image credit: Ballell others., doi: 10.1098/rspb.2024.2052.
Lepidosauria is a clade of lizards, snakes, and tuataras with over 11,000 species, representing the most specialized group of today's tetrapods.
Since their origin over 240 million years ago, lepidosaurs have diversified into countless sizes and body shapes.
Among extant species, body size ranges over three orders of magnitude, typified by body lengths of approximately 1.7 cm. Sphaerodactylus Geckos and giant anacondas that are about 10 meters long.
The extreme size becomes even more dramatic when you consider extinct mosasaurs (up to 17 meters long).
Differences in body shape are reflected in different degrees of body elongation and reductions or modifications of limb elements in multiple lineages, and snake-like body shapes have evolved independently at least 25 times.
Similarly, lepidosaurs exhibit rich diversity in skull composition, shaped by the loss and gain of cranial bones over their evolutionary history and the acquisition of varying types and degrees of cranial motion.
As a result of this morphological diversification, Lepidosaurus conquered diverse ecological niches in most regions of the planet.
In a new study, University of Bristol researcher Antonio Barrel-Mayoral and his colleagues show that the evolution of jaw shape in lepidosaurs was influenced by ecological factors, including phylogeny (evolutionary relatedness) and allometry (scaling of shape with size). They found that it is influenced by a complex interaction of factors that go beyond science.
In terms of jaw shape, the snake was found to be a morphological outlier, exhibiting a unique jaw morphology. This is probably due to the snake's highly flexible skull and extreme mechanism that allows it to swallow prey many times larger than its head.
“Interestingly, we found that jaw shape evolves particularly rapidly in ecologically specialized groups, such as burrowing, aquatic, and herbivorous lizards. This may be due to evolutionary innovations in the lower jaw. “We suggest that this is the key to achieving these unique ecologies,” said Dr. Barrel-Mayoral. Said.
“Our research shows how lizards and snakes have evolved different jaw shapes to adapt to their wide range of ecology, diets and habitats, driving their extraordinary diversity. ”
This study highlights the important role of morphological innovations in promoting diversification in highly biodiverse groups such as lepidosaurs.
“The mandible, an important component of the vertebrate feeding apparatus, has been an important element in vertebrate ecological experimentation and adaptation.”
Looking ahead, the research team plans to further investigate the evolution of lepidosaur heads.
“The lower jaw is important because it works with the muscles that close the jaw to support important functions such as feeding and defense,” Dr. Barrel-Mayoral said.
“We are investigating the relationship between the shape of the skull and the placement of the jaw-closing musculature throughout evolution, and how this influenced the diversification of feeding mechanisms and habits.”
team's work Published today on Proceedings of the Royal Society B.
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antonio barrel others. 2024. Ecological factors in the evolution of jaw morphology in lepidosaurs. Procedure R. Soc. B 291 (2036): 20242052;doi: 10.1098/rspb.2024.2052
Darwin’s ideas began with Alfred Russell Wallace, co-discoverer of natural selection, who disagreed with some aspects of Charles Darwin’s arguments but ultimately realized that most of them were wrong. It has been proven and challenged many times. American botanist Liberty Hyde Bailey published a paper in 1894 pondering whether the mainstream neo-Darwinist formulation of the theory of evolution needed to be extended (it was not). In the 1980s, paleontologist Stephen Jay Gould pursued a similar tack.
Evolutionary biologist Kevin Lara also questions what he calls traditional Darwinian thinking (see “The surprising ways species control their evolutionary destiny”). Some say this is a straw man argument, as it challenges old-fashioned ideas about evolutionary biology, but modern ideas are changing the way we think about developmental biology, cultural evolution, symbiotics, etc. It’s broad enough to encompass all the new aspects you’re learning. Different species coexist closely.
Over the years, the theory of evolution by natural selection has itself evolved, absorbing new discoveries about genes, DNA, population genetics, and epigenetics that did not exist in Darwin’s time. As we report on page 11, identifying evolutionary drivers is essential to understanding how species adapt to climate change, for example, ahead of an avian influenza pandemic. Whether we need to add to the rulebook already at the disposal of evolutionary biologists is debatable. There is a danger that a “God of the Gaps” argument will creep in, where the obvious shortcomings of evolution are exploited by those who point to unscientific explanations.
Obvious shortcomings create a danger that the “god of the gaps” theory creeps in
All theories need to be challenged, and evaluating modern evolutionary biology highlights many aspects of life that may be less appreciated. Darwin’s explanation has survived more than 160 years because it is broadly correct and robust enough to absorb new discoveries. So while the impact of Lara’s approach is not yet clear, Lara’s scrutiny of neglected aspects of life should be welcomed.
Newly described trilobite genera and species alter one morphological character to overcome challenges and modify another character to fulfill the original function, presenting a unique example of functional change in an animal.
Silurian trilobites Waukesha Aspis Atonaefrom the Silurian Waukesha biota of Wisconsin, USA. Image credit: Kenneth Gass, specimen is University of Wisconsin Geology Museum.
It is the only trilobite found in abundance in this biota and is primarily known for its diversity and exceptional state of conservation. arthropod and insect-like animals.
The family that includes this trilobite usually has a pair of spines (sexual spines), one on each side (left and right) of the head shield (head).
There is also a tail (pygidium) that usually reaches a point on the back and is usually extended to form the medial vertebrae (caudal vertebrae). This spine is very long and probably helps turn the animal over if necessary.
In contrast, Pygidium Waukesha Spis It lacks a caudal spine and has a depression (bay) in its place, which is highly unusual for Silurian members of this family.
Therefore, this depression does not serve to turn the animal over, but may have enhanced breathing while the animal was in the registration position by maintaining an opening for water to flow into the gills of the trilobite.
What is even more distinctive is that the genus spines of this species are extremely long, reaching up to the pygidium. These may have worked well to turn the animal over.
Other features Waukesha Aspis Atonae Of note is the significant clustering of individuals, with some cases containing up to 49 partial or complete exoskeletons, likely due to physiological tolerance in the habitat and in the reserve. This may be due to classification and storage in storage locations. gastrointestinal (intestinal) tract occurring only in a few other trilobite species.
“This trilobite is important because it allows us to learn more about the functional morphology of the family (Dharmaceae), typically a conservative group,” Dr. Randolph said.
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E. Randolph and K. Gass. 2024. Waukesha Aspis Atonae n. generation. n. sp.: A specialized Dharmaniidae (trilobite) from the Terikians of southeastern Wisconsin. paleontology journalp. 1-9; doi: 10.1017/jpa.2024.32
The trajectories of theropod dinosaurs could be used as indirect evidence of pre-avian aerial behavior, according to a new study.
The animals in charge are Dromaeosauriformipes larus Trucks are thought to be small microraptid dinosaurs related to the ancestors of birds. Image credit: Julius Csotonyi.
In the study, University of Maryland paleontologist Thomas Holtz Jr. and his colleagues examined two-toed footprints made by fast-moving, small, bird-like microraptid dinosaurs.
with scientific name Dromaeosauriformipes larus these footprints are almost 100 million years old (Cretaceous period) and were discovered preserved in rock slabs in Korea.
“This guy is lanky. He's one of the smallest dinosaurs we have fossils of,” Holtz said.
“These footprints were a puzzle because they were so small and so far apart.”
Paleontologists believe that the producers Dromaeosauriformipes larus It's not just about running on land.
The animal gained lift by flapping its winged arms, allowing it to move faster than relying solely on leg strength.
This form of exercise, known as flap running, falls somewhere between running and flying.
This generates enough aerodynamics to lift the animal off the ground in one go, allowing it to run up a tree, for example, but stops short of flying at full power.
Microraptors are cousins, but Velociraptor And it is unknown whether it is a modern bird Dromaeosauriformipes larus You will be able to fly for longer periods of time.
Trajectory of a Microraptorian theropod excavated from the Jinju Formation in Korea. Image credit: Dececchi others., doi: 10.1073/pnas.2413810121.
“We can overcome the debate over whether pre-avian dinosaurs used arms for locomotion before flight evolved and provide missing details such as which species had these abilities, when they developed them, and to what extent. We can now begin to find out,” he said. Michael Pittman is a paleontologist at the Chinese University of Hong Kong.
“Our findings show that Dromaeosauriformipes larus “It would have needed to run at about 10.5 meters per second (23.5 miles per hour) to make the track using just the power of its hind legs,” said paleontologist Dr. Alex DeCecchi of Dakota State University.
“The relative speed of our footprints is faster than that of modern running animals such as ostriches and cheetahs.”
“This is also unlikely, so we think the dinosaur could have used the aerodynamics created by flapping its feathered arms to lengthen its stride, creating a slower trajectory.”
“The footprints also suggest that the raptor was in the midst of taking off or landing,” Holtz said.
“It's like a plane descending, bouncing a little bit on the runway, and then slowing down.”
“Microraptors, capable of powered flight, were less sophisticated than modern birds in terms of flight equipment. They would have been relatively clumsy.”
of result Published in Proceedings of the National Academy of Sciences.
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T. Alexander Dececchi others. 2024. Theropod trajectories as indirect evidence of pre-avian aerial behavior. PNAS 121 (44): e2413810121;doi: 10.1073/pnas.2413810121
ohOtherwise, it would be news that the CEO of one of the world's largest companies endorsed and shared a fabricated headline published by the leader of a fascist party. For Elon Musk, that happened just Thursday.
Unusually for Musk, his post was a retweet of a tweet by Britain First co-leader Ashley Simon, who shared a fake Telegraph headline about British rioters being held in the Falkland Islands, which he deleted shortly after sending it. The 30-minute livestream on X, the social media site formerly known as Twitter, which Musk bought in 2022, garnered almost 2 million views.
Musk's outspoken criticism of the government has surprised many since unrest began across the UK last week, but it is just the latest sign that the billionaire is heading down a path of radicalisation.
After making his fortune in the dot-com boom and then from his involvement in PayPal, Musk invested in Tesla in 2004 and eventually became its chief executive. For a while, he presented himself as you'd expect of a former software executive running an electric car company, speaking at length about the risks of climate change while also launching and investing in projects that fit a broad vision of improving the future of humanity, including SpaceX, OpenAI and The Boring Company.
But starting in 2020, Musk's public profile began to shift. He'd always been a fairly active user of Twitter, but when the pandemic hit, he began posting much more frequently and for the first time faced the world of fact-checking, as soft-spoken claims about the danger and duration of the pandemic led to calls for his account to be suspended for spreading misinformation.
In his personal life, Musk's relationship with his family has been turbulent: His relationship with Claire Boucher, better known as the musician Grimes, began to fall apart in 2021. Boucher, mother of at least three of his 12 children, ended up in court over custody.
Around this time, Musk began sending Grimes “right-wing memes and conspiracy theories,” according to biographer Walter Isaacson, to which Grimes responded, “Is this from 4chan or something? You're really starting to sound like a far-right person.”
Musk himself has cited Vivienne as the reason for his political switch, telling pop psychologist Jordan Peterson: [his] son [sic]essentially,” and concludes that his son was “killed by the virus of the awakened mind.”
“Many people who are radicalized have a formative personal experience that serves as a cognitive catalyst for their radicalization journey,” said one radicalization expert, who spoke on the condition of anonymity for fear of retribution. “For Musk, it appears that was his daughter's gender transition.”
The expert also believes Musk is essentially a man with “few beliefs beyond those that enrich him, and a strong desire for attention and validation. Since beginning his right-wing radicalization, he has received a flood of the latter from the far right, building for himself the largest echo chamber in the world that will only continue to grow.”
The expert added: “What's remarkable is that he experiences little to no consequences for his actions and is successful in blackmailing reality to make people comply with his beliefs.”
In July, Musk announced the creation of a political action committee, America PAC, which will “largely but entirely” support the Republican Party because it supports “meritocracy and individual freedom.” Musk did not say how much he planned to donate to the PAC, but previous reports had suggested he was considering donating as much as $45 million a month.
The extent of Musk's political transformation has even led to concerns about his health. In March, he He said he was not drunk “almost all the time.” He claimed that his use of ketamine to treat depression during his X posting sessions was unrelated to his social media presence.
About 66 million years ago, at the end of the Cretaceous period, a 10 km-wide asteroid struck Earth near what is now the town of Chicxulub in Mexico. The impact wiped out about 75% of Earth's animal and plant species, including groups such as non-avian dinosaurs and ammonites. A new study identifies key changes in bird genomes caused by the end-Cretaceous mass extinction that ultimately contributed to the remarkable diversity of modern birds.
This painting depicts an asteroid impact in the shallow tropical ocean of the sulfur-rich Yucatan Peninsula in what is now southeastern Mexico. The impact of this massive asteroid, which occurred about 65 million years ago, is believed to have wiped out the dinosaurs and many other species on Earth. The painting shows a Pterodactylus, a flying reptile with a wingspan of up to 50 feet, gliding above low tropical clouds. Image by Donald E. Davis/NASA.
“By studying the DNA of modern birds, we can detect patterns in gene sequences that changed shortly after one of the most significant events in Earth's history,” said Dr Jake Barb, from the University of Michigan.
“The signatures of these events appear to be imprinted in the genomes of survivors in ways that are detectable tens of millions of years later.”
An organism's genome is made up of four nucleotide molecules designated by the letters A, T, G, and C. The order of these nucleotides in the genome defines the blueprint of life.
The DNA code can evolve in ways that change the overall composition of DNA nucleotides across the genome.
These changes in composition are important in determining what genetic variations are possible and contribute to an organism's evolutionary potential, or ability to evolve.
Dr. Belf and his colleagues found that the mass extinction caused a change in nucleotide composition.
The researchers also found that these changes appear to be related to the birds' development as young birds, their adult size, and their metabolism.
For example, in the approximately 3 to 5 million years following the mass extinction at the end of the Cretaceous period, surviving bird lineages tended to decrease in body size.
The development of hatchlings has also changed, with more species becoming 'altricial'.
“This means that when they hatch they are still in a fetal state and need to be fed by their parents, and it may take several weeks for them to fledge,” Dr Barb said.
“Birds that are ready to fend for themselves immediately after hatching, like chickens and turkeys, are called 'precocious.'”
“We found that adult body size and pre-hatching developmental patterns are two important traits of bird biology that we can link to the genetic changes we are detecting.”
“One of the most important challenges in evolutionary biology and ornithology is unraveling the relationships between the major bird groups. The structure of the extant bird phylogenetic tree is difficult to determine.”
Over the past 15 years, researchers have been trying to solve this problem by applying increasingly large genomic datasets.
So far, they have used genomic data to study the evolution of bird genomes using statistical models based on strong assumptions.
These traditional models allow researchers to reconstruct the history of genetic change, but they typically assume that the makeup of DNA, i.e. the proportions of A, T, G and C nucleotides, remains constant throughout evolutionary history.
The study authors developed software tools to more closely track DNA composition over time and across different branches of the tree of life.
This tool allowed us to relax the assumption that DNA's composition is constant.
“This allows us to vary our models of DNA evolution across the evolutionary tree and identify places where there may have been changes in DNA makeup,” said Professor Steven Smith, from the University of Michigan.
“In this new study, these changes were clustered within about five million years of the end-Cretaceous mass extinction,” Dr Belff added.
This approach also allowed the team to estimate which bird traits are most closely associated with changes in DNA composition.
“This is an important type of genetic change that we think is associated with mass extinctions,” Dr Barb said.
“To our knowledge, changes in DNA composition have never before been so clearly linked to the end-Cretaceous mass extinction.”
“We know that mass extinctions can have dramatic effects on biodiversity, ecosystems and the forms of life,” said Professor Daniel Field, from the University of Cambridge.
“Our study highlights that these extinction events can have even larger effects on organismal biology by altering key aspects of genome evolution.”
“This study improves our understanding of the dramatic biological impact of mass extinction events and highlights that the mass extinction that wiped out the giant dinosaurs was one of the most biologically consequential events in the entire history of the Earth.”
By relaxing typical assumptions used in evolutionary biology, the researchers are developing more nuanced insights into the sequence of events in birds' early history.
“We haven't typically thought of changes in DNA configurations and models across the tree of life as changes that indicate something interesting happened at a particular time and place,” Prof Smith said.
“This study shows that we've probably missed something.”
of study Published in the journal Scientific advances.
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Jacob S. Belf others2024. Genomic and life-history evolution link bird diversification and the end-Cretaceous mass extinction. Scientific advances 10(31); doi: 10.1126/sciadv.adp0114
This article is a version of a press release provided by the University of Michigan.
New genus and species of monophenestratan pterosaur named Propterodacillus frankellae It documents the transition from the older rhamphorhynchoid pterosaurs to pterodactyloids.
The holotype Propterodacillus frankellaeImage credit: Frederik Spindler, doi: 10.26879/1366.
Propterodacillus frankellae It lived about 150 million years ago, during the Kimmeridgian stage of the Late Jurassic Period.
This flying reptile had a moderately long skull, about 9 centimetres (3.5 inches) long, and an estimated wingspan of about 55 centimetres (21.7 inches).
This species also had a very short tail and a small but functional fifth finger with two phalanges.
Propterodacillus frankellae a kind of Monophenestratan (Monofenestrata) is a large group of pterosaurs that includes the family Turconopteridae and the suborder Pterodactyloidea.
“As the earliest actively flying vertebrate lineage, pterosaurs were highly successful in evolution throughout the Mesozoic Era.” Dr. Frederick Spindler “The dinosaur museum's Altmühlthal writes in the new paper:
“For most of the long history of research, every specimen could be classified as belonging to one of two major types: the more ancestral long-tailed Rhamphorhynchioidea and the derived short-tailed Pterodactyloidea.”
“The rare anurognathids, the only short-faced pterosaurs, have similarly short tails but otherwise look like rhamphorhynchids and are therefore generally thought to have been deep-nesting rhamphorhynchids.”
“True intermediate, and therefore plausible transitional, forms between the major types were unknown until the discovery of the Curculionoptera.”
The fossil, named the Painten protterosaur, was discovered beneath the Rigol limestone quarry near Painten in Bavaria, Germany.
The specimen consists of a complete and fully articulated skeleton with soft tissue remaining in the radial fibrils of the torso and wings.
“Propterodacillus frankellae It is contemporary with the oldest Archaeopteryx “It came from a nearby basin,” the paleontologists wrote in their paper.
According to Dr Spindler, the discovery fills one of the largest knowledge gaps in the evolution of pterosaur morphology.
“Propterodacillus frankellae “It's a near-perfect mix of rhamphorhynchoid, curcunopteroid and derived pterodactyloid pterosaur features,” he said.
“Similarities with the derived Pterodactyloidea include the shape of the skull and the short tail.”
“For example, the ancestral traits shared with the Turconogopteridae family are Propterodactyl The most distinctive features of this pterosauroidea animal are its functional fifth toe and long caudal snout.”
“Intermediate conditions apply for neck extension, metacarpal extension, and shortening of the fifth toe.”
of paper Published online in the journal Palenitrogy Electronica.
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Frederick Spindler. 2024. Pterosaur articulation from the Late Jurassic of Germany. Palenitrogy Electronica 27(2):a35; doi:10.26879/1366
Is it in the way we live, laugh, love? Or is it our aversion to clichés? Deep inside each of us, there must be something that makes us human. The problem is, after centuries of searching, we haven’t found it yet. Maybe it’s because we’ve been looking in the wrong places.
Ever since researchers began unearthing ancient hominin bones and stone tools, their work has held the tantalizing promise of pinpointing the long-ago moment when our ancestors transformed into humans. Two of the most important fossil discoveries in this quest reach an important milestone this year: 100 years since the first “near-human” was found. Australopithecus Fossils have been discovered in South Africa that have upended previous ideas about human origins, and it’s been 50 years since the most famous fossil was found. Australopithecus Lucy, also known as humanity’s grandmother, emerged from the dusty hills of Ethiopia, and the two fossils have led researchers to believe they can pinpoint humanity’s Big Bang, the period when a dramatic evolutionary wave led to the emergence of humans. Homo.
But today, the story of human origins is much more complicated. A series of discoveries over the past two decades has shown that the beginning of humanity is harder to pinpoint than we thought. So why did it once seem like we could define humanity and pinpoint its emergence, thanks to Lucy and her peers? Why are we now further away than ever from pinpointing exactly what it means to be human?
East Africa contains the world’s most complete record of human evolution, yet scientists know little about how long-term biogeographic dynamics in the region have influenced human diversity and distribution.
An artist’s depiction of early human habitation in Tanzania 1.8 million years ago. Image courtesy of M. Lopez-Herrera / Enrique Baquedano / Olduvai Paleoanthropology and Paleoecology Project.
In the new study, Dr. Ignacio Razaga-Baster from the National Center for Research on Human Evolution (CENIEH) and his colleagues focused on the mammal fossil record of the East African Rift Valley.
“The Late Cenozoic fossil beds of the East African Rift Valley provide the world’s richest, longest and most continuous record of human evolution and its environmental context,” the authors explained.
“As such, the human and faunal records of East Africa have been central to understanding the factors that shaped human evolutionary history.”
“Our study provides a new perspective on how climatic and environmental changes over the past six million years have influenced mammal and human evolution,” Dr Razaghabastar said.
“This study particularly highlights how biotic homogenization – the process by which the faunas of different regions become more similar in composition – has been an important factor in the evolution of ecosystems and the species that live in them.”
“Beta diversity analysis, which shows the relationships between regional and local biodiversity, allows us to trace how changes in vegetation and climate have driven patterns of dispersal and extinction over time.”
The team found that faunas from the Late Miocene and Pliocene (approximately 3 million to 6 million years ago) were primarily made up of endemic species.
The shift towards biotic homogenization, or faunal homogenization, began around 3 million years ago with the loss of endemic species within functional groups and an increase in the number of grazing species shared between regions.
This important biogeographic transition coincides closely with the regional expansion of ecosystems dominated by grasses and C4 grasslands that thrive better in warmer, drier climates.
These environmental changes directly affected the feeding and migration patterns of humans and animals that shared the habitat.
“We are certain that hominoids, like other East African mammals, were influenced by many factors. This study offers a new perspective on the link between environmental and human evolutionary change and, through an integrated approach, provides a framework for future research and to test the hypothesis that hominoids adapted to their environment,” Dr Razaghabastar said.
of study Published in the journal on July 15, 2024 Natural Ecology and Evolution.
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J. Rowan othersLong-term biotic homogenization in the East African Rift Valley during the past 6 million years of human evolution. Nat Ecol EvolPublished online July 15, 2024; doi: 10.1038/s41559-024-02462-0
Paleontologists have described a new species of snake that lived during the Early Oligocene of Wyoming, based on four nearly complete, articulated specimens found curled together in a burrow.
Hibernophis Brighthaupti It lived 38 million years ago in what is now western Wyoming. Image courtesy of Jasmine Croghan.
Hibernophis Brighthaupti It lived in North America 38 million years ago (Early Oligocene Epoch).
The fossil has unique anatomical features, in part because the specimen is articulated, meaning that it was found all together with its bones in the proper order, which is unusual for a fossil snake.
Hibernophis Brighthaupti Probably an early member Boideia A group that includes modern boas and pythons.
“Modern boas are widespread across the Americas, but their early evolution is poorly understood,” said researchers from the University of Alberta. Professor Michael Caldwell And my colleagues.
“These new and extremely complete fossils add important new information, especially about the evolution of the small burrowing boas known as rubber boas.”
“Traditionally, there has been a lot of discussion about the evolution of small burrowing bores.”
“Hibernophis Brighthaupti This suggests that northern and central North America may have been an important base for their development.”
According to the team: Hibernophis Brighthaupti Thanks to its location, the specimen has been remarkably well preserved for tens of millions of years.
“38 million years ago, these particular Hibernophis Brighthaupti “At the time the snakes lived, the Southern Basin-Range volcanic system was incredibly active, emitting huge amounts of volcanic ash,” said Professor Caldwell, lead author of the study.
“The ash settled and helped preserve the remains of the organisms found within the fine sandy mudstone matrix typical of the White River Formation.”
Paleontologists speculate that the animals may have fallen victim to a small flood.
“Geologically speaking, they were preserved in very unusual conditions,” Professor Caldwell said.
“Fossilization is a brutal process. You need exactly the right conditions to preserve something.”
Four discoveries Hibernophis Brighthaupti The curled-up sleeping arrangement also suggests that this may be the oldest evidence of communal hibernation, a behaviour we know today.
“Modern garter snakes are notorious for congregating in the thousands and hibernating together in burrows and holes,” Professor Caldwell said.
“They do this to take advantage of the ball effect created by hibernating animals to conserve heat.”
“It's fascinating to see evidence of this social behavior and hibernation going back 34 million years.”
of study Published in Zoological Journal of the Linnean Society.
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Jasmine A. Croghan othersMorphology and taxonomy of a new fossil snake from the early Rupelian (Oligocene) White River Formation, Wyoming. Zoological Journal of the Linnean SocietyPublished online June 19, 2024; doi: 10.1093/zoolinnean/zlae073
IBlocky World Chipotle Burrito BuilderIn Chipotle, players don the uniforms of the Tex-Mex restaurant chain and make burritos for virtual customers. Available toppings are taken from Chipotle’s real-world menu; shirts and caps feature the Chipotle logo. And when the game launched two years ago, the first 100,000 players earned “Burrito Bucks” to use in their burritos. Chipotle website.
after that Hyundai Mobility Adventure You can test drive models made by Korean manufacturers. Samsung Galaxy Station Here’s a mockup of the company’s latest smartphone designed to help travel to extraterrestrial worlds. Telefonica Town The challenge is to climb an assault course made from products featured in the telecommunications giant’s catalog. Vans World They just hand you a skateboard so you can do a few kickflips in a park plastered with shoe companies’ logos.
These are just a few of the corporate theme parks available. Robloxis one of the world’s most popular online video game platforms, with an average of 77 million players per day earlier this year, and is especially popular with children and younger players (58% of users self-reported as being under 16 years old). The end of last year), Roblox lets you explore fantastical virtual worlds, jumping over obstacles, finding hidden collectibles, and role-playing different tasks just like a kid would on the playground.
But the platform’s biggest selling point is its basic development tools, which allow anyone with little to no computer knowledge to create and share their own video games. Though this toolset is limited by design, it has attracted many people over the past few years, and not just aspiring game developers. This toolset has made Roblox a favorite playground for corporate advertisers, who use the development tools to create branded Roblox games to share with the game’s millions of players.
These advergames (advertisements presented in the form of video games) typically sprinkle corporate branding onto a set of game mechanics simple enough for Roblox’s younger player base. Broader suspicions Criticism that Roblox does not adequately protect children (which the company denies) has led to companies rushing to develop ad-supported games. Brands from Walmart to Wimbledon, McDonald’s to Gucci, Nike to the BBC have launched ad-supported games on the platform. Some have garnered hundreds of thousands of hits, others tens of millions. Seeking more brand involvement By promoting its large, young user base as a major attraction in a competitive advertising market.
An action shot from Vans World, where the company built a virtual skatepark in Roblox complete with footwear messaging. Photo: Vans / Roblox
“In the context of the attention economy, where consumers are exposed to hundreds, even thousands, of ads a day, capturing and maintaining attention is crucial,” says Yusuf Ochi, associate professor of marketing at Bayes Business School, City, University of London. “We are exposed to thousands of ads every day, many of which we don’t remember. Advagames circumvent these filters more effectively by integrating brand messaging into games.”
Öç’s own research has found that ads that utilize interactive features like touching, swiping, and tilting a phone screen can influence consumer preferences and purchase intent. Roblox allows brands to bring these interactive elements into a ready-made, engaging space.
“Roblox’s popularity with a younger demographic opens up new avenues for us to reach and engage the next generation of consumers in a sector where we’re already investing heavily,” said Robert Jan van Dormael, vice president of marketing for consumer audio at Samsung-owned Harman.
JBL, one of Harman’s hi-fi brands, released an official Roblox game in February, where players can collect audio snippets and arrange them into custom tracks, explore pastel-colored worlds and collect virtual currency to spend on cosmetic headphones and portable speakers, all accurately modeled after real-life JBL products. Since its release, it has attracted 1.4 million players, with average playtime over six minutes and engagement metrics orders of magnitude higher than other games. A few seconds A person typically spends an hour reading a social media post…
No one doubts that Albert Einstein had a brilliant mind, but the Nobel Prize winner famous for his theories of special and general relativity wasn’t blessed with a big brain. “Jeremy DeSilva at Dartmouth College in New Hampshire.”
This seems surprising. Big brains are a defining feature of human anatomy, something we are proud of. Other species may be faster or stronger, but we thrive using the ingenuity that comes from our big brains. At least, that’s what we tell ourselves. Einstein’s brain suggests that the story is not so simple. And recent fossil discoveries bear this out. In the past two decades, we’ve learned that small-brained hominin species persisted on Earth long after species with larger brains emerged. Moreover, there is growing evidence that they were behaviorally sophisticated. For example, some of them made complex stone tools that could only have been made by humans with language.
These findings turn questions about the evolution of the human brain upside down: “Why would large brains be selected for when humans with small brains can survive in nature?” says DeSilva. Nervous tissue consumes a lot of energy, so large brains must have undoubtedly provided an advantage to the few species that evolved them. But what was the benefit?
The answer to this mystery is beginning to emerge. It appears that brain expansion began as an evolutionary accident that then led to changes that accelerated brain growth. Amazingly, the changes that drove this expansion also explain the recent 10 percent shrinkage of the human brain. What’s more, this suggests that our brains could shrink even further, potentially causing our demise.
Fossil and molecular evidence suggests that complex multicellular organisms arose and proliferated during the Neoproterozoic Era (1-541 million years ago). An extreme glacial period during the Cryogenian Period (720-635 million years ago), an event commonly referred to as Snowball Earth, led to dramatic changes in Earth's climate and oceans. New research suggests that Snowball Earth was an environmental trigger for the proliferation of complex multicellularity across multiple groups of eukaryotic organisms.
Artist's impression of “Snowball Earth.” Image courtesy of NASA.
Solving the mystery of why multicellular organisms emerged could help pinpoint life on other planets and explain the enormous diversity and complexity seen on Earth today, from marine sponges to redwoods to human societies.
The prevailing thinking is that oxygen levels must reach a certain threshold for a single cell to form a multicellular colony.
However, the oxygen story does not fully explain why the multicellular ancestors of animals, plants and fungi emerged simultaneously, or why the transition to multicellularity took more than a billion years.
The new study shows how the specific physical conditions of Snowball Earth, particularly the viscosity of the oceans and the depletion of resources, may have led eukaryotes to become multicellular.
“It seems almost counterintuitive that these extremely harsh conditions – this frozen planet – could actually select for larger, more complex organisms, rather than causing species to become extinct or shrink in size,” said William Crockett, a doctoral student at MIT.
Using scaling theory, Crockett and his colleagues found that a hypothetical ancestor of early animals, reminiscent of swimming algae that fed on prey instead of photosynthesizing, would have grown in size and complexity under Snowball Earth pressures.
In contrast, single-celled organisms that move and feed by diffusion, such as bacteria, will grow small.
“The world changed after Snowball Earth because new life forms emerged on the planet,” said Professor Christopher Kemps of the Santa Fe Institute.
“One of the central questions of evolution is: How did we evolve from nothing on Earth to beings and societies like us? Was it all by chance?”
“We don't think it's luck. There are ways to predict these big changes.”
The study shows how, during the Snowball Earth era, the oceans froze, blocking sunlight and reducing photosynthesis, which resulted in nutrient depletion in the oceans.
Larger organisms that could process more water were more likely to eat enough to survive.
As the glaciers melt, these large creatures could expand even further.
“Our study provides hypotheses about ancestral features to look for in the fossil record,” Crockett said.
of study Published in Proceedings of the Royal Society B.
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William W. Crockett others2024. Snowball Earth's physical constraints drive the evolution of multicellularity. Proc. R. Soc. B 291 (2025): 20232767; doi: 10.1098/rspb.2023.2767
This article is a version of a press release provided by the Santa Fe Institute.
IEven though it’s the next big game for the PlayStation 5 and it’s in Sony’s DNA, there’s still something Nintendo about Astro Bot. That’s because it’s perfectly designed for the controller it’s played on, taking advantage of all the features of the DualSense controller. The spacey aesthetic, with different planets representing different colorful worlds to jump into, is reminiscent of Super Mario Galaxy, and it’s just pure joy to play. On a console where the most well-known hits are pretty serious (like God of War and The Last of Us), Astro Bot prioritizes fun.
“I think Sony’s product design is about cool, but it also embraces playfulness,” says Nicolas Doucet, studio director at Team Asobi, the Japanese studio behind Astro Bot. “The two are not mutually exclusive or antagonistic… [PlayStation] The hardware team loved it and no one cared less about it. These are highly crafted products, so you can imagine that designers wouldn’t want them tampered with. But we were looking at PSVR and turning it into a mothership.”
The first Astro Bot game, Rescue Mission, was the best thing ever made for PlayStation’s VR headset, a clever platformer brimming with original ideas. Astro’s Playroom was a treat that came packaged with the PS5 when it launched in 2020, designed to show off the capabilities of Sony’s new console and its controller. It did so brilliantly, with levels themed around the PS5’s super-fast SSD hard drive and a singing GPU soundtrack, taking full advantage of every little gimmick in the PS5 controller, from the microphone to the haptic triggers. But Astro’s Playroom was also, unexpectedly, an interactive museum of Sony’s gaming hardware. As I played, I collected consoles, peripherals, and other knickknacks, gradually filling the lab with PlayStation history. It was fun.
A cheeky idea that will never come again… Astro Bots. Photo: Sony/Team Asobi
During the development of Astro’s Playroom, Team Asobi worked very closely with the people making the PS5 and the controller. They were even running around the building with prototypes in paper bags, Doucet said. “They gave us prototype controllers that were twice the size of a normal controller, or they put two controllers together because they needed more power. You can see how much work went into miniaturizing all that and making a controller that looks and feels good. They came up with features like adaptive triggers and haptics because they Feeling Our job is to generate as many ideas as possible about how it might be used, and then validate and sometimes deny those intuitions. After all, we’re not selling technology, we’re selling an experience, a magical experience. come “From technology.”
Now, Team Asobi was given the freedom to create a bigger, longer game (12 hours or so) as an extended tech demo, without being tied to a single piece of PlayStation hardware. That said, it’s still a clear tribute to all things Sony. It incorporates many ideas that didn’t make it into the 2020 game. Astro Bot now flies between levels in a controller-shaped spaceship whose exhaust gases are made up of PlayStation button symbols. Running around several levels as this adorable robot, I slid down a waterslide with a bunch of beach balls, jumped off a high board into a pool, took down an angry giant octopus by slingshotting myself in the face with a retractable frog-face boxing glove, used a magnet to gather pieces of metal into a ball big enough to smash things, and blew up Astro like a balloon before sending him flying with the gas that erupted.
It’s super cute, funny and full of playful details. We discovered that the flames spewing from Astro’s jetpack can cut through wooden logs, but only because it’s fun; Astro struck a confident surfing pose when he hopped onto a turtle to see if he could ride on its back; and when we tickled a sad-looking anemone to discover a secret room, we were greeted with a chorus of “Secret!” These details are inconsequential, but as Doucet points out, “They’re important, because all these little things become memories.”
The levels are like a solar system that slowly expands outwards as the challenge increases. There’s the safest one towards the middle, where a 5-year-old can have fun kicking a football, jumping through water, and punching the occasional bad guy. And then there are the hardest levels towards the edge. There are over 150 little tributes to PlayStation games, from PaRappa the Rapper to Journey, in the form of cosplay robots that you can rescue. The challenge levels will test your 90s childhood 3D platforming skills, including precision jumps across platforms suspended in time and a miniature ice rink floating in space. This is the simplest fun I’ve had playing a game in a long time.
Team Asobi is relatively small, with about 65 people, and relatively international. According to Doucet, three-quarters of the team is Japanese, and the rest are from 16 countries. Some of them have worked on past PlayStation projects, such as Shadow of the Colossus and Gravity Daze, but some are newcomers. They are all focused on making Astro Bot a true mascot for PlayStation, Doucet says. “We want to develop Astro into a really strong franchise. We want to develop this little character even more,” he says. “There are a lot of expectations to meet at PlayStation, but we never forget that we are the underdogs. That’s part of the mindset of a successful person, you always want to be in pursuit of something. If you become too satisfied, the game starts to lose its soul.”
Astro Bot certainly has a soul. It’s clear that the development team is having a lot of fun. “We’re geeky people, and I’m a PlayStation collector myself,” says Doucet. “It might sound a little corny, but it’s important that we’re happy so that our players are happy.”
Astro Bot will be available on PlayStation 5 on September 6th
Euchericherata A large group of arthropods that includes horseshoe crabs, scorpions, spiders, mites, ticks, and the extinct sea scorpions and snails. Abundant cetapedites The new species of Euchelycerate, which lived in what is now Morocco during the Early Ordovician period 478 million years ago, bridges the gap between modern and Cambrian species.
rebuilding the life of Abundant cetapedites. Image credit: Elissa Sorojsrisom.
“Modern scorpions, spiders, and horseshoe crabs belong to a vast lineage of arthropods that appeared on Earth about 540 million years ago,'' said Lorenzo Lustri, a paleontologist at the University of Lausanne. Ta.
“More precisely, they belong to the subphylum, chelicerates, which includes organisms equipped with pincers used specifically for biting, grasping prey, and injecting venom, and therefore chelicerates ( Euchelicerata+Pycnogonida). But what is the ancestor of this very special group?
“This question has puzzled paleontologists ever since the study of ancient fossils began.”
“Among early arthropods, it has been impossible to identify with certainty which forms share enough similarities with modern species to be considered ancestral.”
“The mystery is further complicated by the dearth of available fossils from the critical period between 505 million and 430 million years ago. This has made genealogical research easier. must.”
Dr. Rustri and his co-authors collected fossils of euchelicerate from the 478-million-year-old Fezouata Shale in Morocco, and found that the modern-day euchelicerate and the Cambrian (505 million-year-old) We identified a new species that binds the eucheris cerate.
with scientific name Abundant cetapeditesthe body length of this species was 0.5-1 cm.
“This animal makes it possible for the first time to trace the entire lineage of Euchelicerates, from the appearance of early arthropods to modern spiders, scorpions and horseshoe crabs,” Dr Rustri said.
“Initially, we just wanted to describe this fossil and give it a name.”
“I had no idea it would hold so many secrets.”
“It was therefore an exciting surprise to discover, after careful observation and analysis, that it also fills an important gap in the evolutionary tree of life.”
“Yet, this fossil has not yet revealed all its secrets,” he added.
“Indeed, some of its anatomical features allow for a deeper understanding of the early evolution of the eucherycerate group and perhaps link other fossil forms to this group, the similarities of which are still hotly debated. It is even possible.”
of result appear in the diary nature communications.
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L. Rustri other. 2024. Late Ordovician syndiphosrines reveal the diversity and evolution of early euchelicerates. Nat Commune 15, 3808; doi: 10.1038/s41467-024-48013-w
Red, yellow, and green are now the colors of traffic lights, but that wasn’t always the case. The first (and disastrous) attempt to install a traffic light occurred on December 10, 1868, which also marks the official date of the installation of the world’s first traffic light. It was located in front of the British Parliament in London and consisted of two movable signs mounted on lever-operated arms, illuminated at the top for visibility at night. Unfortunately, the unlucky scoreboard didn’t last long, as it exploded less than two months later, killing the police officer who was putting up the sign.
Traffic lights started to be installed worldwide with the advent of electricity in cities. Cleveland (USA) was home to the first two-color traffic light operating on electricity. Detroit and New York added yellow between red and green in 1920. In Europe, Paris saw the first traffic lights in 1923, followed by other major cities. A year later, Berlin, Milan, Rome, London, Prague, and Barcelona also installed traffic lights.
The first treaty on the unification of road signals was signed in Geneva in 1931 with the goal of enhancing road traffic safety and facilitating international traffic on roads with standardized traffic lights. Most of the signs seen on streets today were established by this agreement, making the three colors of red, yellow, and green the standard for traffic lights. The choice of colors for traffic lights was inspired by railway traffic conditions, where red indicated stopping, white indicated moving, and green indicated caution. The introduction of yellow was to address the confusion caused by white, which could easily be mistaken for starlight at night.
When it comes to color perception, red has the longest wavelength, followed by yellow and green. Longer wavelengths travel farther, which is why colors with longer wavelengths are chosen for signal transmission. As a result, red light can travel the farthest, making it visible even in conditions like rain or fog.
In a new study, a team of paleontologists examined the structure of teeth. Feredkodon Chowi aims to better understand the phylogenetic relationships and evolutionary paths of a new species of Xuozalaid mammal that lived in what is now China during the Jurassic period.
rebuilding the life of Feredkodon Chowi (right) and Dianoconodon Yonggi (left). Image credit: Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences.
Professor Patricia Vickers-Rich, a researcher at Monash University and Museums Victoria, said: “Our study challenges current theory and provides a new perspective on the evolutionary history of mammals.”
“By describing the complex tooth shapes and occlusal patterns, we provide important insights into the phylogenetic relationships and evolutionary trajectory of the family Xenodiaceae, which was largely unknown until its recent discovery in China. ”
Shoeteraid a mammal-like animal from the Jurassic period, has baffled scientists because of its unique dental features.
These creatures have so-called pseudoclaws (basin-like structures) located in front of the triangular teeth of the mandibular molars, and the claws seen in modern therian mammals are similar to the triangular teeth of the lower molars. It is different from the claw-like pattern located at the back.
“This unique tooth pattern hinders our understanding of schootelid relationships and the first steps in the evolution of mammalian species,” Professor Vickersrich said.
Professor Vickers Rich and her colleagues examined the pseudotribosphene tooth of a new Jurassic schiotelid. Feredkodon Chowi represented by two skeletal specimens.
They were able to more completely dissect the tooth structure using a variety of analyses, and the results suggested that the tooth structure of schootherids is very similar to that of docodontans. Ta.
This study suggests that there are no true trigonids present in the basal teeth of Xuozalidae, indicating that they are more closely related to Docodontans than previously thought.
This reassessment of tooth structure not only resolves outstanding interpretations but also triggers a reconsideration of evolutionary connections within mammals.
“In 1982, a single small Jurassic mandible with four teeth was placed at a single point in the mammal family tree,” said Dr Thomas Rich, also from Monash University and Museums Victoria.
“We now have two virtually complete specimens analyzed in different ways, all of which place them in very different positions on the mammal family tree.”
“Additional specimens and different methods suggest different interpretations. Science often works like this.”
Based on new data, the Xuozidae appears to belong to a separate clade, the Docodontiformes, separate from the Auscutolibospheniformes, and are therefore grouped as follows: docodontance.
This finding highlights the importance of pseudotribosphenic characters in elucidating the initial diversification of mammals.
“This study highlights the presence of a huge variety of tooth morphologies in early mammals, demonstrating unique ecomorphological adaptations throughout the evolutionary development of mammals,” Professor Vickersrich said. Ta.
F. Mao other. The Jurassic family Xenotheliidae represents the earliest dental diversification of mammals. Nature, published online on April 3, 2024. doi: 10.1038/s41586-024-07258-7
Please try to imagine. I remember being on the bus or walking in the park and having an important task slip out of my mind. Maybe you were planning to send an email, catch up on a meeting, or have lunch with a friend. Without missing a beat, just say out loud what you forgot, and a small device strapped to your chest or placed on the bridge of your nose will send you a message, summarize a meeting, or remind a friend to go to lunch. Send invitations. No need to poke at your smartphone screen and the job is done.
This is the kind of utopian convenience that a growing wave of technology companies are trying to achieve through artificial intelligence. Generative AI chatbots such as ChatGPT exploded in popularity last year as search engines like Google, messaging apps like Slack, and social media services like Snapchat raced to integrate the technology into their systems.
AI add-ons have become commonplace across apps and software, but as the first AI-powered consumer devices launch and compete for space with smartphones, the same generation technology is poised to enter the hardware realm.
One of the first people out of the gate was eye pin California startup Humane. It’s a wearable device that’s only slightly larger than a can of Vaseline and attaches to your shirt via a magnet. You can send texts, make calls, take photos, and play music. However, there is no app support and no screen. Instead, it uses a laser to project a simple interface onto your outstretched palm. The built-in AI chatbot can be instructed through voice commands to search the web or answer queries in much the same way you’d expect from ChatGPT.
“I plan to train Ai Pin to be my personal assistant to facilitate my writing and creative work,” said the Virginia-based company, which pre-ordered the device ahead of its initial U.S. launch in April, says Tiffany Jana, a consultant with Since she travels a lot, she thinks it would be nice to have a photographer and translator to accompany her. “I don’t have all the assistants and large teams that supported me in the past. I’ve always been a tech guy and enjoy ChatGPT.”
Meanwhile, Facebook’s parent company Meta has already Smart glasses equipped with AI Partnering with Ray-Ban and Chinese companies TCL and Oppo Companies followed suit with their own AI glasses. All of these have pretty much the same functionality as Ai Pin and are sold in a way that connects to an AI chatbot that responds to voice commands.
It’s a way to curb smartphone overuse by providing the same essential functionality without addictive apps.
If all of this sounds a lot like what your smartphone’s voice assistant or your living room’s Alexa already does, that’s because that’s essentially what it does. “Using AI in new devices is still the norm today,” says David Lindlbauer, an assistant professor at the Human-Computer Interaction Institute at Carnegie Mellon University in Pennsylvania. “Everyone uses Google Suggestions, Apple Siri to navigate their phones, or smart suggestions in apps on their phones.” The difference, he says, is that these new and upcoming devices will, which aims to embed AI capabilities in a “less obtrusive and more ubiquitous way.”
Its design intent is most evident in future products pendant From US startup Rewind and software developer Tab AI Avi Shiffman. These small devices hang around your neck and passively record everything you hear and say during the day, then transcribe the most important parts so you can read them back at your convenience later. Designed to summarize. These are essentially productivity tools that bundle the kinds of generative AI capabilities found elsewhere into standalone devices.
But why would you want a device that does more than what your smartphone already has? Partly to free yourself from the less-than-welcome elements. Humane is pitching Ai Pin as a way to curb smartphone overuse by offering the same important functionality without the addictive apps that make you scroll compulsively. “An alcoholic is not dependent on the bottle, but on the contents,” says Christian Montag, chair of molecular psychology at the University of Ulm in Germany, by analogy. He says social media platforms in particular are often interested in intentionally extending screen time in order to show more ads or collect personal data. say. Experiments show that when you use your smartphone in grayscale mode, Reduce user retentionremoving the screen completely can have even more severe effects.
While this may seem counterintuitive to the tech industry’s ever-increasing appetite for new features and gadgets, it’s probably not as alien as it first seems. “Many people wear headphones all day long,” says Lindlbauer. “Therefore, it is entirely possible to move away from the temptation of scrolling through doom and move towards technology that allows us to access the digital world constantly, but unobtrusively.”
However, discussions about their broader applications are beginning to take place. For some, the future of this technology lies not in how it can be integrated into existing platforms, but in whether it can fundamentally change the way platforms are accessed. “There will be no need to use different apps for different tasks,” former Microsoft CEO Bill Gates said in an article. Blog post outlining his vision. “Simply tell your device, in everyday language, what you want to do.” Then, leave it to your device to figure out what apps, platforms, and information it needs to complete the task you set.
This is an idea that will be put into preliminary practice in the next stage. R1. Developed by Rabbit, a Californian AI startup, the R1 is a handheld device that looks a bit like a portable gaming console and operates like a powerful voice assistant. However, it is designed to interact directly with an app on your phone on your behalf, rather than simply connecting to an AI chatbot that generates passive responses to your commands (like other wearable gadgets). Masu. The idea is that R1 acts as an all-in-one interface for your device, a kind of central app that can control everything else.
“We’re not building products for new use cases. We’re developing better, more intuitive ways to address existing use cases.” said Jesse Lyu, Chief Executive Officer of Rabbit. He describes the R1 as a “digital companion” that doesn’t replace your smartphone, but makes it easier to use.
The value of that approach will become clear when R1 launches later this year. However, similar experimental devices are expected to follow. Sam Altman, CEO of OpenAI, which developed ChatGPT, is reportedly already in talks with former Apple chief designer Jony Ive to explore hardware ideas. And a group of startups and Silicon Valley powerhouses are now racing to develop the chips and processors these new devices will need to power their AI models.
Whatever form these AI devices end up taking, they will be hard to compete with the globally connected, highly capable, and intuitively controlled glass rectangles that are in most of our pockets. You’re going to have to work. However, as ubiquitous as smartphones seem, they too have an expiration date. “Smartphones have only been with us for about 15 years,” says Lindlbauer. “I don’t want to believe that smartphones are the pinnacle of technology or that we’ll ever use them the way we do now. [another] 15 years.”
This stability exists despite the incredible diversity in wing patterns, sizes, and caterpillar morphology across more than 160,000 species worldwide today, according to one study. new paper It was published in the magazine natural ecology and evolution.
lissandra belargas. Image credit: Eric Silvestre.
Butterflies and moths (in order) Lepidoptera) make up 10% of all described animal species and are extremely important pollinators and herbivores in many ecosystems.
In a new study, Professor Mark Blaxter and colleagues from the Wellcome Sanger Institute set out to understand the processes driving the evolution of chromosomes in this highly diverse group.
They analyzed and compared more than 200 high-quality chromosome-level genomes of butterflies and moths.
They identified 32 ancestral chromosomal components; Merian element Thanks to the work of pioneering 17th century entomologist Maria Sibylla Merian, most butterfly and moth species have remained intact since their last common ancestor more than 250 million years ago.
With the exception of a single ancient fusion event between two chromosomes that led to the 31 chromosomes found in most species today, the chromosomes of most modern species correspond directly to these ancestral Merian elements.
Researchers discovered that not only are chromosomes incredibly stable, but the order of genes within them is also stable.
They discovered several species with small changes, mainly involving the fusion of small autosomes and sex chromosomes. This highlights the role of chromosome length as a driver of evolutionary change.
However, scientists believe that the blue butterfly (lissandra) and the group containing cabbage butterflies (Pieris) ignored these genomic structure constraints.
These groups underwent large-scale chromosomal reshuffling, including large-scale chromosome reshuffling through chromosome breakage and fission and fusion.
This study improves our understanding of the factors that lead to genetic diversity in these insects. This will guide efforts to protect and conserve specific species facing unique challenges and environmental changes related to climate change.
“The chromosomes of most butterflies and moths living today can be directly traced back to 32 ancestral Merian elements that existed 250 million years ago,” said Dr. Charlotte Wright, researcher at the Wellcome Sanger Institute. said.
“It is surprising that even though the species has diversified extensively, its chromosomes have remained surprisingly intact.”
“This calls into question the idea that stable chromosomes may limit species diversification. Indeed, this feature may be the basis for building diversity. We We hope to find clues about rare groups that have circumvented these rules.”
“Studies like this that allow us to delve into these evolutionary processes are only possible through efforts like the Darwin Tree of Life Project, which generate high-quality, publicly available genome assemblies,” Blaxter said. the professor said.
“We are stepping up these efforts with Project Psyche, where we aim to sequence all 11,000 butterfly and moth species in Europe in collaboration with collaborators across the continent.”
“As important pollinators, herbivores, and food sources in a variety of ecosystems, and as powerful indicators of ecosystem health, a deeper understanding of the biology of butterflies and moths through Project Psyche will This will be useful for future research on adaptation and speciation for biodiversity conservation.”
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CJ light other. Comparative genomics reveals the dynamics of chromosome evolution in Lepidoptera. Nat Ecole Evol, published online on February 21, 2024. doi: 10.1038/s41559-024-02329-4
Microscopic image of a modern cyanobacterium called Oscillatoria
Shutterstock / Ekki Ilham
Researchers have identified photosynthetic structures inside a 1.75 billion-year-old cyanobacteria fossil. This discovery is the oldest evidence yet of these structures and provides clues to how photosynthesis evolved.
Emmanuel Javeau Researchers from the University of Liège in Belgium analyzed fossils collected from rocks at three locations. The oldest site is the approximately 1.75 billion-year-old McDermott Formation in Australia, the other two are the billion-year-old Grassy Bay Formation in Canada and the Bllc6 Formation in the Democratic Republic of Congo. was.
From these rocks, the researchers extracted fossilized cyanobacteria that produce energy through photosynthesis. “They're so small, less than a millimeter, that you can't see them with the eye,” Java says. She and her colleagues placed the fossils in resin, sliced them into sections 60 to 70 nanometers thick using a diamond-bladed knife, and analyzed their internal structures using an electron microscope.
They discovered that cyanobacteria in Australia and Canada contain thylakoids, membrane-enclosed sacs in which photosynthesis occurs. “These are the oldest fossilized thylakoids that we know of today,” Java says. Previously, the oldest thylakoid fossils were around 550 million years old. “So we delayed the fossil record by 1.2 billion years,” she says.
This is important because not all cyanobacteria have thylakoids and it is unclear when these structures, which make photosynthesis more efficient, first evolved, they said. Kevin Boyce at Stanford University in California. The origins of this diversification can now be traced back at least 1.75 billion years, he says. The oldest fossils of cyanobacteria are about 2 billion years old, but other evidence, such as geochemical signatures, indicate that photosynthesis has been around even longer than that.
It is widely believed that cyanobacteria helped build up oxygen in Earth's atmosphere 2.4 billion years ago. “The idea is that perhaps during this time they invented thylakoids, which increased the amount of oxygen on Earth,” Java says. “Now that we have discovered very old thylakoids and found them preserved in very old rocks, we think we might be able to test this hypothesis even further back in time,” she says. .
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