Humpback whales use songs to communicate with each other across oceans
Karim Ilya
Biologists have discovered how baleen whales produce their unique songs. It involves the uniquely shaped larynx.
Baleen whales, including humpback whales, communicate through complex songs that can be heard over great distances. “People recorded the first whale sounds in his 1970s, but only recently have we started to recognize the different sounds these animals actually make,” he says. Cohen Elemans At the University of Southern Denmark. “Now the question is, how do they do this?”
To learn more, Elemans and his team extracted the larynxes of three recently deceased baleen whales.Balaenoptera borealis), humpback whale (Megaptera novaeangliae) and the northern minke whale (Balaenoptera acutorostrata).
The larynx, commonly known as the voice box, is an organ located in the upper neck of mammals. As air flows through the organ, the tissue folds vibrate, creating sound.
But that's not the case with baleen whales, Ellemans says. When the researchers examined the whale's larynx, they discovered that the organ had an unexpected shape, with a cushion of fat on one side.
When these whales breathe, air is forced against the fatty material, which vibrates and makes sound. “I've never seen this in any other animal,” Ellemans says. “This is unique to baleen whales.”
Whales can also recycle air from their lungs, which is useful when they are underwater for long periods of time. When you exhale through the trachea and larynx, air enters a sac with walls that contract, returning air to the lungs.
Using a computer model of its larynx, the researchers found that baleen whales can generate frequencies of up to 300 hertz at depths up to 100 meters below the ocean's surface. This is within the frequency range of noise emitted by ships, raising concerns that ship noise could drown out their songs.
“These whales can't escape this situation,” Elemans said. “Therefore, we need to take steps to reduce noise.”
View from a kayak on Death Valley Temporary Lake, February 9, 2024
Michael Kohler/NPS
Heavy rain has fallen in California in recent weeks, resulting in the remarkable formation of a rare temporary lake in Death Valley, the driest place in the United States.
Record levels of rain have flooded California over the past month. Numerous atmospheric river storms (narrow bands of highly concentrated moisture in the air) worsen wet conditions, putting up to 37 million people at risk of flooding.
Heavy rainfall also hit Death Valley National Park along the California-Nevada border. In fact, it rained so much that the park's Badwater Basin, normally a dry salt flat, temporarily turned into a shallow lake.
At 86 meters below sea level, the basin is the lowest point in North America and was home to an ancient body of water that researchers named Lake Manly tens of thousands of years ago.
Over the past few decades, the lake has been backfilled several times. In August 2023, rains associated with Hurricane Hillary formed a lake 11.3 kilometers long and 0.6 meters deep, which shrank in the following months. Well, it has been replenished once again. The current maximum length of the lake is nearly 10 kilometers and the depth is approximately 0.3 meters.
Last year, Death Valley National Park Closed for several weeks after Hurricane Hillary This is because flooding damaged the road network and limited opportunities for visitors to explore the temporary lake. This time, the park opened and the re-emergence of Lake Manly attracted tourists, including swimmers and kayakers.
Crescent Nebula: More complex than the human brain?
Reinhold Wittich/Stocktrek Images/Alamy
Back in 2012, neuroscientist Christoph Koch wrote in his book: Consciousness: Confessions of a Romantic Reductionist The human brain is “the most complex object in the known universe.” This seems intuitive, given that the brain has approximately 86 billion neurons, which are connected in ways that are still beginning to be understood. But when I put it, David Wolpert At New Mexico's Santa Fe Institute, founded in the 1980s as a hub for the budding field of complexity science, he doesn't think so. “It's almost a travesty that we are the most complex system in the universe,” he says. “That question is actually misguided.”
Nevertheless, I persevere. Is there a common measure of complexity that can be applied to complex systems of all kinds? After all, if you squint, galaxy clusters and the filaments that connect them look like intertwined circuits of neurons. Masu. The human brain even has almost as many neurons as there are galaxies in the observable universe. This formal similarity may have something to do with the general laws by which complexity emerges, he says. Ricard Sole At Pompeu Fabra University in Barcelona, Spain. Or maybe not. “By chance, it might show up in both systems, but that doesn't mean anything,” he says.
Moreover, complexity is not defined by components and their interconnections. It's the idea that the whole is more than just something.
Iojima is itself a volcano, located on the edge of the massive underwater Akahoya volcanic caldera.
Asahi Shimbun via Getty Images
The largest volcanic eruption in current geological time occurred underwater off the southern coast of Japan about 7,300 years ago. This explosion produced more than three times as much material as the eruption of Mount Tambora, the largest known modern eruption. Mount Tambora exploded in Indonesia in 1815, causing dramatic climate changes that led to the “Year Without a Summer” in 1816.
The new record holder, the Kikai Akahoya eruption, originated from a submerged caldera in an area off Japan's Kyushu island.
The devastating impact this eruption had on humans living on nearby islands has been recorded by geologists and archaeologists, and analysis of volcanic ash deposits has shown that this eruption was the most recent geological event that began 11,700 years ago. It was shown to be one of the largest eruptions of the Holocene era. .
However, the origin and scale of the explosion were unclear because of the difficulty in accessing the submarine caldera, the crater formed after the volcanic eruption, and the volcanic deposits on the ocean floor.
now, Nobukazu Sema Professors at Japan's Kobe University calculated that the Kikai-Akahoya eruption produced far more rock and ash underwater than previously thought, about 70 cubic kilometers. Combining this with previous estimates from volcanic rocks deposited over Japan, the total amount of material pumped out of the volcano equates to more than 300 cubic kilometers of material. This is twice the amount of water in Lake Tahoe in the western United States. “It was huge, more than we expected,” Seema says.
However, it is still far behind the huge eruption of Indonesia's Toba supervolcano, which released more than 2,500 cubic kilometers of magma about 74,000 years ago.
To assess Kikai Akahoya, Seema and his colleagues conducted seismic surveys and mapped the underwater area around the caldera, about 200 meters below the surface. This allowed them to see layers of material around the volcano, but they could not tell which ones were due to the eruption itself.
The researchers used remote-controlled drilling robots to collect sediment from the ocean floor, take core samples from the underlying rock, and identify layers containing characteristic volcanic glass. This data allowed us to isolate the volcanic layers from seismic surveys and calculate the total amount of material produced by the volcano.
“We know that very large, caldera-forming eruptions like this are rare, but we also know that there have been many more of these events in the geological past, and we have found evidence for them. ” he says. David Pyle at Oxford University.
The main reason it took so long for the scale of the eruption to be determined is because calderas deep under the sea are difficult to locate and measure, he said.
It still remains in the Kikai Akahoya caldera. big magma chamber It's below. If this explodes, there could be another eruption, but it's unclear how big it will be because it depends on the size of the magma chamber, Seema said. He says the chance of an eruption is small, but his team is working on measuring the dome more precisely to better understand the risks.
Creating better models to predict future eruptions by combining historical information from past eruptions, such as the Kikai-Akahoya eruption, with research from recent underwater eruptions, such as the 2022 Hunga-Tonga eruption. Pyle says it could help.
Is consciousness a collection of discrete states that we move between?
PM Images/Getty Images
What is consciousness? This is perhaps the greatest mystery remaining in the human brain. No wonder it's known as the “hard problem.” We also cannot agree on whether consciousness is one thing or whether it is various states. But a new way to explore that question sheds interesting light on this most elusive of concepts.
We use words like “blacking out” to describe fainting or falling asleep, but researchers believe that consciousness is much more than simply flipping a metaphorical switch from “on” to “off.” I have long understood that it is complicated. However, there is still much debate as to whether it is a single phenomenon with many continuous shades, as imagined as a dimmer switch, or a collection of discrete states, like separate television channels. there is.
Thinking about consciousness from a physicist's perspective may help answer this question. That's because the brain is constantly transitioning between states defined by patterns of electrical signals, and physicists have metrics to study such busy, ever-changing systems. In 2014, robin carhart harris University of California, San Francisco and colleagues hypothesized that entropy may be particularly useful.
Entropy describes how chaotic a system is. One measure of entropy is how many different microscopic configurations (such as the arrangement of water molecules within a glass) exist within a particular macroscopic property (such as the volume of a glass). Researchers proposed that brain states have greater entropy when measured…
The human brain is likely the most advanced computer in the world. While it operates differently than a traditional computer and has a much softer structure, its computing power is unparalleled.
Neuromorphic computing, which models machines after the human brain and nervous system, has been a growing concept since the 1980s. Many attempts have been made to achieve this, with the DeepSouth project at the International Center for Neuromorphic Systems at Western Sydney University aiming to be the most advanced yet, with the potential to perform 228 trillion actions per second.
How does a brain computer work?
DeepSouth uses an approach to computing that is inspired by the human brain and body, aiming to combine processing power and memory just like the human brain does. By distributing power to billions of tiny units (neurons) that interact through trillions of different connections (synapses), the brain becomes incredibly powerful while consuming very little energy.
What does this mean for the future of computers?
This approach could lead to significant improvements in energy efficiency and battery life for devices such as smartphones. It could also enable the development of smaller and more powerful computers, bringing high-powered computing to a variety of applications and industries.
How DeepSouth can help fight aging
While the primary goal of DeepSouth is to improve computing technology, the neuromorphic approach also offers insights into the workings of the human brain. This could lead to a better understanding of diseases such as Alzheimer’s, dementia, and Parkinson’s and potentially aid in developing treatments for these conditions.
“Whale Bones was photographed in the most extreme conditions,” explains jury chair and renowned photographer Alex Mustard. “A breath-holding diver descends below the Greenland ice sheet to witness a carcass. This composition invites us to think about the impact we have on the great creatures on this planet. Since the advent of humans, wild animals were reduced by his 85%.
“Currently, only 4 percent of mammals are wild animals, and the remaining 96 percent are humans and livestock. We need to change the way we do things to find a balance with nature.”
Portuguese photographer Nuno Sa has been named the Save Our Seas Foundation’s 2024 Marine Conservation Photographer of the Year. His photo, dubbed “Saving Goliath,” depicts a beachgoer’s futile efforts to save a stranded sperm whale off the coast of Portugal.
Underwater Photographer of the Year is an annual competition that celebrates the best underwater photography since 1965.
Today’s competition attracts entries from all over the world, with 13 categories testing photographers in themes such as macro, wide-angle, action photography, and shipwreck photography, as well as four categories specifically for photographs taken in British waters.
Below are the winners of this year’s contest and our favorite ranked images.
Winner – Macro Category
Pot-bellied seahorse (ventral hippocampus) Pictured surrounded by bright green corals with interesting patterns. Photographed on Bear Island, Australia. Photo credit: Talia Grace/UPY2024
Dealing with snoring can be a bothersome experience for everyone involved, whether it’s falling asleep on a public bus or waking a loved one. Researchers may have found the best diet to combat this issue.
Obstructive sleep apnea (OSA) is a common condition that puts people at risk for high blood pressure, stroke, heart disease, and type 2 diabetes. This is because OSA causes multiple disruptions during sleep due to loud snoring and interruptions in breathing.
The solution may lie in a diet rich in vegetables, fruits, and whole grains, as suggested by a new study published in the journal ERJ Open Research. This diet may help prevent or treat OSA.
In order to test this theory, researchers at Flinders University in Adelaide, Australia, used data from 14,210 participants in the US National Health and Nutrition Examination Survey. Participants were asked to list everything they had consumed in the past 24 hours, and the research team categorized their responses into three dietary patterns: a healthy plant-based diet, an unhealthy plant-based diet, and a diet high in animal products.
The “unhealthy” plant-based diet included high amounts of refined carbohydrates, potatoes, sugary drinks, sweets, desserts, and salty foods.
Additionally, participants completed a sleep questionnaire to determine the likelihood of having OSA. The researchers found that people with diets high in plant foods were 19% less likely to suffer from snoring caused by OSA. On the other hand, those who consumed an unhealthy plant-based diet were 22% more likely to have OSA.
Researchers believe that a healthy plant-based diet may be important due to its anti-inflammatory components and antioxidants, which can impact fat mass, inflammation, and muscle tone, thereby affecting a person’s OSA risk.
Dr. Johannes Melak, the chief researcher, emphasized that diet quality is important in managing the risk of OSA, and that a healthy plant-based diet may reduce inflammation and obesity.
Using new 21 cm radio observations made with NSF's Green Bank Telescope, astronomers have discovered that more than 250 clouds of neutral gas are blasting out into interstellar space from the center of the Milky Way. These clouds are likely the product of the same phenomenon that created the Fermi bubble.
The artist's concept is that clouds flowing from the center of the Milky Way are caught up in extremely hot winds and accelerated to speeds of hundreds of kilometers per second. Image credit: NSF/GBO/P. Vosteen.
It has long been known that energetic processes at the center of the Milky Way generate high-velocity hot winds that spread through intergalactic space with temperatures of millions of degrees and speeds of thousands of kilometers per second. Most large galaxies have winds like this.
The serendipitous discovery that some of this hot gas is trapped in cold hydrogen clouds was made by Australia's ATCA telescope, which measured 21cm radio emissions from interstellar hydrogen atoms.
This suggests that there may be an undiscovered population of clouds transporting material away from the Milky Way's core.
Hydrogen clouds are important in their own right, but they also act as probes for hot air.
Conditions in very hot winds are difficult to measure, but just as a few leaves thrown up on Earth indicate the direction and speed of the wind in the area, cold clouds can You can track its status.
The sensitivity of the Green Bank Telescope (GBT) makes it an ideal instrument for detecting faint signals from interstellar hydrogen, but mapping these clouds and understanding their true extent is essential. It wasn't easy.
Dr Felix James 'Jay' Rockman, senior astronomer at Green Bank Observatory, said: 'It took many years to systematically map hundreds of square degrees using GBT in search of weak hydrogen emissions. ” he said.
“Once we identify a few promising candidates, we can follow up with targeted observations with other telescopes to show us even more.”
“This cloud must have been ripped off from a region near the center of the Milky Way galaxy and flung outward by a burst of star formation or black hole activity.”
Some of these clouds have the fastest outflow velocities of any cloud ever observed in the Milky Way, and may even escape from the Milky Way.
In an unexpected development, new data from the APEX telescope reveals that some hydrogen clouds contain molecules and dense cold gas.
“No one would have expected that the clouds violently ejected from the Milky Way would harbor relatively fragile molecular material, but that's what happened,” Rockman said.
Astronomers using the MeerKAT array recently mapped hydrogen in several clouds with high angular resolution, showing that it evolves and gets shredded as it flows into interstellar space.
“These new results open the door to further discoveries,” Dr. Rockman said.
“How clouds that are accelerated to speeds of more than 400 kilometers per second remain stable is a mystery.”
“The chemical processes inside these clouds are very unusual and unexplored.”
Dr. Rockman and his colleague Dr. Enrico Di Teodoro of the University of Florence, findings in AAS243243rd Meeting of the American Astronomical Society, New Orleans, Louisiana, USA.
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Felix Rockman and Enrico di Teodoro. 2024. New investigation of neutral clouds in the Milky Way's core wind. AAS243Abstract #2851
Early hunter-gatherers faced with food shortages may have benefited from the impulsivity associated with ADHD
John Civic/Science Photo Library
Attention-deficit hyperactivity disorder (ADHD) may have evolved in hunter-gatherer societies because it was an advantage for them, according to the results of a new study. Characteristics commonly associated with the disease, such as impulsivity, cause some foragers to move from areas where resources are depleted to areas with richer harvests faster than areas without the disease. It could have been something like this.
ADHD affects people's behavior, which can result in them acting impulsively and having trouble concentrating. Although its exact cause is not fully understood, the condition tends to run in families.
Its origins are similarly unknown, he says. Arjun Ramakrishnan At the Indian Institute of Technology Kanpur. “Is it a remnant of the hunter-gatherer world?”
To explore this, Ramakrishnan, david barak Researchers at the University of Pennsylvania recruited 506 people in the United States to play an online foraging game. Players were instructed to collect as many berries as possible in 8 minutes by moving their cursor over the bush.
They were given the choice of staying in the bush or trying their luck in another bush that might have more or less fruit. Moving to a new bush also resulted in a short timeout, so players had to balance the chance of getting more berries with the time lost by moving.
Before playing the game, participants completed a questionnaire assessing whether they had symptoms of ADHD, such as difficulty concentrating or restlessness.
People with ADHD symptoms spent about four seconds hovering over a particular bush compared to those without symptoms, and as a result, the former group collected an average of 521 berries. However, I was able to collect 602 berries.
The findings suggest that selective pressures faced by early hunter-gatherer societies, such as lack of food and other resources, may have driven the evolution of ADHD. There may have been some foraging situations in which it was better to stay than move on, but Barak said this tendency to leave could have been an advantage in some scenarios.
“Humans and other apes are very sophisticated foragers, but like almost all other animals, we tend to stay in our plots too long and harvest too much in our fields.” he says. “Therefore, starting action early may be beneficial to reduce over-harvesting, and this may be where the impulsive characteristics of ADHD come in handy.”
Although many people around the world are no longer looking for food, situations still exist where similar decision-making processes occur. If a person is studying for an exam, he may start by looking at one resource. If it doesn't help you understand the topic, Barak says, you may quickly switch to another resource, which may be more efficient and helpful.
“Although it is difficult to determine exactly how ADHD-related behaviors were adaptive in past environments, we find that people with and without ADHD show measurable differences in foraging strategies. In that sense, these results are convincing,” says Dr. Dan Eisenberg at the University of Washington in Seattle.
but Annie Swanepoel North East London NHS Foundation Trust said it did not reflect the scarcity of resources experienced by many of the early hunter-gatherers, as foraging operations produced abundant berry crops.
An international team of herpetologists led by scientists from the University of New Mexico Highlands and the University of Queensland has described a mysterious new species of anaconda living deep in the Amazon.
anaconda (genus Eunectes) is a group of aquatic snakes endemic to the east of the Andes Mountains of South America.
These large-bodied snakes live in lowland rivers and wetlands. They have typical adaptations for an aquatic lifestyle, such as their nostrils and eyes located on the dorsal side of their heads, and exhibiting dorsal coloration and markings that blend well with aquatic plants.
Prior to this study, four species were recognized in this genus. Eunectes murinus represents the sister lineage of a group consisting of Eunectes veniensis, Eunectes deschaouenseiand Eunectes Noteus.
The largest of these species is Eunectes murinusor the blue anaconda, lives in most tropical regions of the continent, including the Amazon, Essequibo, and Orinoco river basins and several smaller watersheds.
The other three species are smaller Eunectes murinus distributed within or adjacent to the distribution of Eunectes murinus.
recently described species Eunectes veniensisor venian anaconda, is restricted to the Beni region of Bolivia.
Eunectes deschaouensei, or black-spotted anaconda, is distributed in the northeastern part of the continent. They range from the Amazon River Delta in Brazil to French Guiana and possibly Suriname.
Eunectes Noteusor yellow anaconda, is distributed in the south. Eunectes murinus Includes the Pantanal, Chaco, and other highly seasonal regions of tropical and subtropical South America, including Brazil, Bolivia, Paraguay, Argentina, and Uruguay.
“Our team received an unusual invitation from the Huaorani people to explore the area and collect samples from an anaconda population, rumored to be the largest extant species,” the University of Queensland said. Professor Brian Fryco-lead author of the study.
“Indigenous hunters took us on a 10-day expedition into the jungle to search for snakes they consider sacred.”
“As we paddled our canoes down the river system, we were lucky enough to spot a few anacondas lurking in the shallows, waiting for prey.”
“The size of these magnificent creatures was incredible. The female anaconda we encountered was a whopping 6.3 meters (20.7 feet) long.”
“The Huaorani have reported other anacondas in the region measuring over 7.5 meters (24.6 feet) and weighing about 500 kilograms.”
named Eunectes Acaimaor northern green anaconda, a new species occurs in the Orinoco Basin.
“Eunectes Acaima branched from Eunectes murinus They are almost 10 million years old and genetically 5.5% different,” Professor Fry said.
“This is very important. To put it into perspective, there is only about a 2% difference between humans and chimpanzees. This discovery is the highlight of my career.”
“The Amazon continues to face alarming ecological threats,” he added.
“Deforestation in the Amazon basin due to agricultural expansion has resulted in an estimated loss of 20-31% of habitat and could affect up to 40% of the forest by 2050.”
“Another growing problem is habitat degradation due to land fragmentation caused by heavy metal pollution associated with runoff from industrialized agriculture and oil extraction activities.”
“Forest fires, drought and climate change are also notable threats.”
“These rare anacondas and the other species that share this remote ecosystem face significant challenges.”
“Our next research project will focus on heavy metal pollution in the Amazon,” Professor Fry said.
“It's not just these giant snakes that are facing environmental threats, but almost every creature in this region.”
“While the discovery of a new species of anaconda is exciting, it is important to emphasize the urgent need to further study these endangered species and ecosystems.”
“Particularly urgent is investigating how petrochemicals from oil spills are affecting the fertility and reproductive biology of rare snakes and other keystone species in the Amazon.”
discovery of Eunectes Acaima is explained in paper in diary Diversity.
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Jesus A. Rivas other. 2024. Untangling the anaconda: Unraveling a new species of green and rethinking yellow. Diversity 16(2):127; doi: 10.3390/d16020127
Forgetting may be essential for the brain to remember
Hans Nelemann/Getty Images
There's nothing more frustrating than trying to remember a fact or memory only to realize it's gone. You may ask yourself, is this the beginning of mental decline or the beginning of a degenerative brain disease? You probably don't think forgetting is a good thing. But it's possible. New research on memory suggests that it is actually a healthy and necessary brain function that is becoming increasingly important in our rapidly changing lives. “You want to be able to adapt to your environment because the environment is always changing. But if you get too attached to your initial experience, you won't be able to act adaptively,” he says. thomas ryan At Trinity College, Dublin, Ireland. Interestingly, his research also suggests that forgotten memories remain in the brain and could be restored if needed.
Everyday forgetfulness, such as not remembering what you had for dinner last week, is called natural forgetfulness. This is in contrast to pathological forgetfulness caused by conditions such as brain injury or Alzheimer's disease. Far from being a problem, natural forgetfulness supports one of our most unique and powerful traits: our ability to generalize. There are times when having a very detailed memory can be invaluable, such as when reviewing for an exam or acting as a witness to a crime, but you can't generalize without considering the specifics quickly and flexibly. says Mr. edwin robertson At the University of Glasgow, UK. “For a chair to be considered a chair…
A team of Chinese physicists has synthesized two new isotopes: osmium-160 and tungsten-156.
Location of the new isotopes osmium-160 and tungsten-156 on the nuclide chart. Image credit: Huabin Yang.
“The magic numbers of protons and neutrons make the nucleus particularly stable. The traditional magic numbers are 8, 20, 28, 50, 82, and 126,” said Dr. Huabin Yang, a physicist at the Institute of Modern Physics, Chinese Academy of Sciences. said the colleague.
“In previous research, physicists discovered that traditional magic numbers disappear and new magic numbers appear on the neutron-rich side of the nuclide chart.”
“Will other traditional magical numbers also disappear in the nuclear region where there is an extreme lack of neutrons?”
“Further exploration is critical to enriching and developing nuclear theory and improving our understanding of nuclear forces.”
In the new study, Dr. Yang's team conducted experiments at the Gas-Filled Recoil Separator Spectrometer for Heavy Atom and Nuclear Structures (SHANS) in Lanzhou, China.
Researchers have synthesized two new isotopes, osmium-160 and tungsten-156, using nuclear fusion vaporization reactions.
They measured the energy of the alpha particle and the half-life of the alpha-emitting isotope osmium-160.
On the other hand, the daughter nucleus, tungsten-156, was found to be a β+ emitter with a half-life of 291 ms.
The researchers used the newly measured alpha decay data to derive the alpha decay reduction for osmium-160 and compared it to other nuclei with 84 neutrons and fewer protons.
They discovered a surprising trend: the higher the number of protons, the lower the decay rate.
“This trend is interpreted as evidence of enhanced closure of the 82 neutron shell towards the proton drip line, which is supported by the increase in the neutron shell gap predicted by the theoretical model,” Dr. Yang said. said.
“The increased stability of the 82 neutron shell closure is thought to be due to the increasing proximity of the double magic nucleus lead 164, which may be a stable atomic nucleus with 82 protons and 82 neutrons. Masu.”
“Although lead-164 is predicted to cross the proton drip line, enhanced shell effects could make it a bonded or quasi-bonded nucleus.”
of study It was published in the magazine physical review letter.
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HB Yang other. 2024. Discovery of new isotopes 160with oz 156W: Reveals improved stability of N=82 shell closure on the neutron-deficient side. Physics.pastor rhett 132 (7): 072502; doi: 10.1103/PhysRevLett.132.072502
Thomas Edison says: He held a steel ball in each hand as he prepared for a nap.. When he nodded, they would fall and wake him up so he could write down ideas that came to him in the moments just before sleep, when he believed he was most creative. But are there really specific times when our brains perform better? And more broadly, are we better at different kinds of thinking at different stages of life? If so, it's worth asking how you can make the most of these mental peaks and maximize your brain's capabilities.?
Edison's methods may have been unorthodox, but It turned out that he was onto somethingas Delphine Audinet It was discovered in 2021 by the Paris Brain Institute and colleagues. They gave 103 slightly sleep-deprived people a seemingly complex math problem that they could solve with simple creative insight. Participants who woke up immediately after falling asleep were almost three times more likely to take a creative leap and solve a problem than those who stayed awake throughout the experiment.
This knowledge may be useful if you are looking for inspiration. But if that's the memory you're trying to optimize, deep sleep is when your brain does the heavy lifting, accumulating new long-term memories from the day's experiences. To get the most out of this, you need plenty of sleep. Adults need 7 to 9 hours of sleep each night. If you are among them, A lot of people…
The Arisaema plant is a death trap for pollinating mushroom gnats.
ArchivePL/Alamy
Pulpit flowers, famous for trapping and killing pollinators, may also act as nurseries for insect eggs, revealing a more subtle and mutually beneficial relationship that challenges existing assumptions. Become.
These jug-shaped plants are Alisa EmmaThey mimic the look and smell of musty mushrooms to attract fungus gnats, which are major pollinators. But when insects dip into the flower's spathe in search of this pungent food, they are unable to crawl out because the interior of the flower's elongated hood is too waxy. The gnat struggles violently inside its mottled red-green cup, scattering pollen all around it to thoroughly pollinate the plant, but eventually dies of exhaustion.
But when Kenji Suetsugu A team from Japan's Kobe University hatched 62 flowers of the Asian pulpit jack-in-the-pulpit species Alisa Emmathunbergi, they realized something was wrong. The gnat was helplessly captured and laid eggs in the crown of the flower. When the flowers begin to wither, these larvae feed on the shriveled and rotting flesh and emerge as adults a few weeks later.
The fact that traps can serve the dual function of pollination sites and nurseries for the next generation of pollinators is “really surprising,” Suetsugu says.
Furthermore, some adults are able to escape from flower traps before it is too late. So the ducks aren't “technically lethal,” Suetsugu said. This suggests that plants strike a balance between ensuring pollination and not completely depleting the number of pollinating gnats.
These findings suggest that the relationship between jack-in-the-pulpit and its pollinators is much more complex than previously thought and cannot be neatly categorized as purely mutualistic or antagonistic.”, says Suetsugu.
This relationship may represent a step in the evolution of plants, from purely deceptive pollinators to mutually beneficial relationships with pollinators. Importantly, the findings may also suggest that there is more to the relationships between other plants and pollinators around the world than meets the eye.
Indeed, these findings challenge some preconceived ecological concepts. Jeff Ollerton at the University of Northampton, UK. In this particular case, the situation is mixed, as only some insects seem to be benefiting.He has more types of Alisa Emma (This genus includes more than 190 species) To learn more, you need to study this species in detail.
“The deeper we look into plant-pollinator interactions, the more we learn about the ability of plants to manipulate pollinator behavior and how pollinators can evolve strategies to acquire resources. There are more surprises to come,” Ollerton said.
Refugio State Beach, Calif. — Severe storms that hit California have caused damage in some parts of the state. the most iconic tree.
A majestic palm tree that normally flanks Refugio State Beach just north of Santa Barbara has fallen over the past few days. Images show how a huge 100-year-old tree fell into the sea and was completely uprooted.
Local officials say multiple factors caused the trees to fall. Years of coastal erosion were combined with powerful storm surges and supersaturated soil from a series of atmospheric rivers that brought heavy rain and high winds across the state.
“When the ground becomes saturated, the trees begin to fall, and both eucalyptus and palm trees fall over because the ground becomes too wet for their roots to hold in the ground.” Santa Barbara Craig Vanderswag, chief of the County Fire Battalion, told NBC News.
California State Parks Channel Coast District Superintendent Dena Bellman said officials have tagged several more trees on the coast as at high risk of falling, especially with the new heavy rains hitting California. Ta.
Due to this threat, the park is currently temporarily closed to the public.
The dramatic footage is a symbol of the power of these atmospheric rivers, which climate experts say is growing stronger as the planet's temperature rises.
Los Angeles received 75% of its annual average precipitation in the first three weeks of February alone. The city has received more rainfall than Seattle, New Orleans and Miami, and is about 2 inches away from setting a record for the wettest February.
Bitcoin is a digital currency that operates freely from central control. Rather than an authority like a bank or government tracking who owns what, Bitcoin relies on encryption.
So-called miners collect information about transactions and record them on a ledger called a blockchain. These miners perform a huge number of calculations with the aim of completing cryptographic problems, 0.69% of the world's electricity in the process. The first miner to solve this problem adds a collection (block) of transaction data to the blockchain.
You will also be rewarded with a certain amount of newly created Bitcoins. Bitcoin is built into the source code that writes and runs the network. Every 210,000 blocks, an event called a halving occurs where the size of the reward is reduced by 50%. This is intended to avoid inflation due to too many coins being created.
The first block ever mined gave a reward of 50 coins, which is now down to 6.25 coins after three halvings. The last halving was in May 2020.
When is the next Bitcoin halving?
The next Bitcoin halving is expected to occur around April 19th, reducing miners' rewards to 3.125 coins. The reward continues to decrease and disappears completely around 2140 after 21 million coins have been created. At that point, there are no new coins.
Why is it important?
For those who use Bitcoin to purchase goods and services or hold Bitcoin as an investment, nothing changes. The current Bitcoin pool will remain. However, for miners, the value of the rewards they receive will be significantly reduced.
This could lead some miners to close up shop if they decide the effort isn't worth the reward. But the reality is that mining economics are constantly changing, and the industry is likely to adapt and continue as it has always done.
More powerful computers are being created all the time that can perform mining calculations faster, making it easier to mine blocks. However, the feedback mechanism within Bitcoin's code constantly adapts to this by increasing or decreasing the difficulty of calculations depending on the total computer power currently allocated to mining. The purpose of Bitcoin's source code is that a new block is created approximately every 10 minutes, and the network adjusts to speed up or slow down as needed.
When Bitcoin was first launched in 2009, it was possible to mine coins almost instantly with even a basic computer. Nowadays, you need a room filled with powerful equipment, often high-end graphics cards and computationally proficient custom hardware.
What will happen to the price of Bitcoin?
The recent emergence of exchange-traded funds (ETFs), regulated financial products offered by large banks that offer an easier way to invest in Bitcoin, has been long anticipated and was expected to drive up prices. .Some analysts are now estimate Approximately 704,400 coins are already in the hands of the ETF.
There are currently two schools of thought regarding the effect of half-life. Some think the halving will give Bitcoin more impetus, causing the price to rise further, while others think the impact is already priced in. Regulatory approval for Bitcoin ETFs is by no means certain, but the halving is a certainty, so its impact may already be reflected in the price. But it's almost certain that halving won't double the price.
The wild price fluctuations that Bitcoin has experienced over the past few years have become less frequent, and metrics that track volatility seems to be on a downward trend. But at the end of the day, any discussion about Bitcoin's price is just speculation.
A new study led by the University of South Carolina Leonard Davis School of Gerontology suggests that fasting-mimetic dieting (FMD) cycles can significantly reduce disease risk factors and decrease human biological age. FMD was developed by Professor Walter Longo and his team, involving a five-day diet high in unsaturated fats and low in overall calories, protein, and carbohydrates. The diet mimics the effects of water-only fasting while providing necessary nutrients and making fasting more manageable for individuals.
During the five-day fasting period, participants were allowed to consume specified amounts of plant-based soups, energy bars, energy drinks, chip snacks, and tea and given supplements to ensure they didn’t miss out on important vitamins, minerals, and essential fatty acids.
Previous studies have shown the various health benefits of FMD, including promoting stem cell regeneration, reducing chemotherapy side effects, and decreasing signs of dementia in mice. The recent study focuses on the effects of FMD on human immune system aging, insulin resistance, liver fat, and biological age.
The research team analyzed two groups of men and women aged 18-70 who received three to four cycles of FMD per month. The results showed reductions in diabetes risk factors, reduced fat in the abdomen and liver, and rejuvenation of the immune system. Data analysis also demonstrated that FMD participants lost an average of 2.5 years in biological age.
Professor Longo hopes these findings will encourage more doctors to recommend FMD cycles to patients with elevated risk factors for disease and to the general public interested in improving their health and vitality. He suggested that healthy people between the ages of 20 and 70 should consider trying FMD two or three times a year, cautioning that there may be concerns when used in combination with certain diabetes medications.
About our experts:
Walter Longo is the Edna M. Jones Professor of Gerontology and Biological Sciences and Director of the Longevity Institute at the University of Southern California Leonard Davis School of Gerontology in Los Angeles.
Biologists from the Altos Institute, Cambridge Institute of Science, and the University of Cambridge have discovered that genetic elements derived from retroviruses (retrotransposons) are essential for the production of myelin (the insulating sheath that surrounds nerve axons) in mammals, amphibians, and animals. I discovered that fish. This gene sequence, called retromyelin, is likely the result of an ancient retroviral infection, and comparisons of retromyelin in mammals, amphibians, and fish indicate that retroviral infection and genome invasion events occurred separately in each of these groups. suggests that it has occurred.
gauche other. suggest that retrovirus internalization played an important role in the emergence of vertebrate myelin. Image credit: Ghosh other., doi: 10.1016/j.cell.2024.01.011.
Myelin, the complex fatty tissue that lines vertebrate nerve axons, allows rapid impulse conduction without the need to increase axon diameter. This means that the nerves can be packed more closely together.
It also provides metabolic support for the nerves, allowing them to lengthen.
Myelin first appeared on the tree of life around the same time as the jaw, and its importance in vertebrate evolution has been recognized for a long time, but until now it is unclear what molecular mechanism caused its appearance. was.
Tanay Ghosh and colleagues at Altos Labs-Cambridge Institute of Science noticed the role of retromyelin in myelin production while studying the gene networks used by oligodendrocytes, the cells that produce myelin in the central nervous system. .
Specifically, they were studying the role of non-coding regions, including retrotransposons, in these gene networks. This has not been previously studied in the context of myelin biology.
“Retrotransposons make up about 40% of our genome, but we know nothing about how they helped animals acquire specific traits during evolution.” said Dr. Ghosh.
“Our motivation was to learn how these molecules serve evolutionary processes, especially in the context of myelination.”
Researchers discovered that in rodents, retromyelin RNA transcripts regulate the expression of myelin basic protein, one of the key components of myelin.
When we experimentally inhibited retromyelin in oligodendrocytes and oligodendrocyte progenitor cells (the stem cells from which oligodendrocytes are derived), the cells were no longer able to produce myelin basic protein.
To find out whether retromyelin is present in other vertebrate species, scientists looked for similar sequences within the genomes of jawed vertebrates, jawless vertebrates, and some invertebrate species. Searched for.
They identified similar sequences in all other classes of jawed vertebrates (birds, fish, reptiles, amphibians) but found no similar sequences in jawless vertebrates or invertebrates. did not.
Robin Franklin, a neuroscientist at the Altos Institute at the Cambridge Institute of Science, said: “There was an evolutionary drive to speed up the conduction of impulses in axons, because the faster the impulse conduction, the faster we can grab objects and move away from them.'' Because they can run away.”
Next, the authors wanted to know whether retromyelin was integrated once in the ancestor of all jawed vertebrates, or whether there were separate retroviral invasions in different branches.
To answer these questions, they constructed a phylogenetic tree from 22 jawed vertebrate species and compared their retromyelin sequences.
This analysis revealed that retromyelin sequences are more similar within species than between species, suggesting that retromyelin has been acquired multiple times through a process of convergent evolution.
The researchers also showed that retromyelin plays a functional role in myelination in fish and amphibians.
When they experimentally disrupted the retromyelin gene sequence in fertilized zebrafish and frog eggs, they found that the developing fish and tadpoles produced significantly less myelin than normal.
“Our findings open new avenues of research exploring how retroviruses are involved in directing evolution more generally,” said Dr. Ghosh.
A team of anthropologists from the University of Wyoming, the University of California, Santa Barbara, and the University of New Hampshire has discovered a 4,750-year-old megalithic rotunda measuring 18 meters (60 feet) in diameter at Calakpuma in America's Cajamarca Basin. Peru. It is one of the oldest known monuments and megalithic structures in the northern Andes of Peru, and one of the earliest examples in the Western Hemisphere.
It is centered around a 4,750-year-old rotunda, with the modern city of Cajamarca in the background. Image credit: Toohey other., doi: 10.1126/sciadv.adl0572.
Monumental architecture is central to many aspects of the development of human social organization and social complexity, but the drivers of its origin remain poorly understood.
This form of architecture is intentionally built to be larger and, in some cases, more elaborate than necessary given the desired functionality.
The world's oldest ceremonial monumental architecture, whether represented by megalithic arrangements, large platforms or buildings, or bounded plazas, were larger than immediate households and were often larger than the population of the local area. was the result of a collective or corporate activity by a larger group.
Early well-known examples of this type of ceremonial architecture include Göbekli Tepe in Turkey, Stonehenge in England, and the Great Pyramid of Giza in Egypt, which were built in 9,000 BC, 2,900 BC, and 2,900 BC, respectively. It was built by 2,650 AD.
Göbekli Tepe is of particular importance here, as it was built during the pre-Pottery Age, during the Neolithic period, by hunter-gatherer-forager tribes who were at the pinnacle of sedentary living and food production.
Early examples of monuments in the Western Hemisphere include Watson Brake and Poverty Point, which date to 3400 BC and 1700 BC, respectively.
The newly discovered megalithic square is Late preceramicIt dates back to 2850 BC.
The structure is located at the Calapuma archaeological site in the Cajamarca Basin in the northern Peruvian Andes and is built of large, free-standing, vertically placed megaliths.
This construction method has never been reported in the Andes and is different from other monumental rotunda in the region.
“This structure was built about 100 years before the Great Pyramids of Egypt, around the same time as Stonehenge,” said Dr. Jason Toohey, an anthropologist at the University of Wyoming.
“It was probably a meeting place and a ceremonial place for the early people who lived in this part of the Cajamarca Valley.”
“These people were primarily hunter-gatherers, and may have only recently begun growing crops and domesticating animals.”
Kalakpuma Square is formed by two concentric walls, approximately 18 meters in diameter.
“The Late Preceramic Period, during which Plaza Calapuma was constructed, was a period of socio-economic transition in the Andes,” the researchers said.
“On the central coast, the communities that came together to build giant mounds in places like Caral were not yet full-time farmers, but engaged in complex systems of exchange with coastal fishing villages.”
“Inland communities grew some food and industrial crops, but also relied on hunting and trading seafood.”
“In the northern highlands of Peru, the people who built the plazas of Calapuma may have begun experimenting with food production, but they were also probably still relatively mobile hunter-gatherers.”
“Like Nanchoc centuries earlier, groups in Cajamarca may have engaged in the construction of enterprises in Calapuma's plaza and subsequently repeatedly negotiated group identity there through the integration of events and perhaps feasts.”
“The construction of Late Pre-Peraque monumental ceremonial buildings in the coastal and highlands of the central Andes probably originated from small groups, as was the case with earlier monumental mass buildings outside the Andean region of South America, such as Göbekli Tepe. It represented a change in the social world with changes in the associated belief systems into more collective and locally focused beliefs and actions.”
of findings It was published in the magazine scientific progress.
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Jason L. Twohey other. 2024. A monumental stone plaza located at an altitude of 4750 meters in the Cajamarca Valley in Peru. scientific progress 10(7); doi: 10.1126/sciadv.adl0572
CAPE CANAVERAL, Fla. — Researchers have identified a quasar with a black hole at its center that may be the most luminous object in the universe. This quasar is growing at an incredible rate, capable of consuming an amount equivalent to the sun in a single day.
The record-breaking quasar shines 500 trillion times brighter than the sun. Scientists reported in the journal Nature Astronomy that the black hole fueling this quasar is more than 17 billion times more massive than the sun.
Despite appearing as mere dots in images, scientists believe quasars to be formidable entities.
The disk of luminous gas and other material orbiting a quasar’s black hole is akin to a cosmic hurricane.
“This quasar is the most violent place in the universe as we know it,” said lead author Christian Wolff of the Australian National University.
The object, known as J0529-4351, was initially discovered by the European Southern Observatory in 1980 and misclassified as a star. It was not confirmed to be a quasar until last year, after telescope observations in Australia and the Atacama Desert in Chile.
“What’s interesting about this quasar is that it’s hiding in plain sight and was previously misclassified as a star,” said Priyamvada Natarajan of Yale University.
Further analysis revealed that the quasar consumes the equivalent of 370 suns a year, or one sun a day, and the black hole at its center has a mass between 17 billion and 19 billion times that of the sun. More observations are needed to understand its growth rate.
Quasars are located 12 billion light years away and have existed since the beginning of the universe. One light year is 5.8 trillion miles.
Ancient bronze hand discovered in Irregui, northern Spain
Juancho Egana
An inscription found on a 2,000-year-old metal needle may be written in a language related to modern-day Basque. If this interpretation is correct, it could help explain one of the biggest mysteries in linguistics: the origin of the Basque language.
However, other linguists say there is not enough evidence to link the inscription to Basque.
The bronze hand was discovered in July 2021 at the top of a hill called Irregui in the Pyrenees Mountains in northern Spain. Archaeologists have been excavating there since 2007, first discovering a medieval castle and then exploring a much older settlement from the Iron Age.
This settlement was founded between 1500 and 1000 BC. It was probably attacked by the Romans and abandoned in the 1st century BC.
Irreghi's hand is a bronze plate measuring 14 centimeters long, 12.8 centimeters wide, and only 0.1 centimeter thick, with a patina tint. On the back of the hand are his four lines of text, rewritten by first scratching and then dotting into the metal.
Most words cannot be associated with any known language, but the first word is “sorionek”. Matin Ayesteran Professors at the University of the Basque Country in Bilbao, Spain, and their colleagues claim it is similar to Basque. Zorio cat, which means “lucky.” Furthermore, the last word is “elaukon”, which is likened to a Basque verb. Zelaucon.
Irregi's hand carved in a mysterious language
Matin Ayesteran et al.
It is said that this hand was probably intended to represent good fortune or attract good fortune by appealing to the gods. Mikel Edeso Eguia in Aranzadi Scientific Society Assisted with excavations at Donostia (also known as San Sebastian), Spain.
The researchers also claim that the hand is evidence that languages related to Basque have been spoken in northern Spain for 2,000 years. Most languages currently spoken in Europe belong to the Indo-European family, but Basque does not. “It has nothing to do with any other language we know,” says Edeso Eguia. Previous research has tentatively linked the Basques to a group of people known as the Bascons, who lived in the Pyrenees according to classical sources.
However, the idea that the inscriptions on the hands are written in a language related to Basque is not widely accepted.After the hand was first described in his 2022 book, linguists Celine Munour at the University of Pau and the Adour region in France. Julen Manterola Presented at the Basque University of Vitoria-Gasteiz Criticism.
“There's not enough evidence,” Manterola said. This is also because there are very few words in the hands of the Irregian language. Not enough, he says, to properly compare with known languages.
Furthermore, the connection with the Basque language is based almost exclusively on the similarity between “sorionek” and “solionek”. Zorio cat. “You can't connect other words with historical Basque,” Munor says.
Even that similarity can be misleading, Manterola says. Similar phrases in Basque have changed in predictable ways over the centuries, arriving at their current form. Zorio catmust have taken a completely different path.
“We expect more inscriptions to emerge,” Munour says. “In this case, we will be able to learn more about the possible relationship between this language and the Basque language.”
in new paper Published in the magazine on January 31, 2024 historical biologypaleontologists announced the discovery of a previously undocumented species of dinosaur related to the famous dinosaur. stegosaurus.
Hypothetical reconstruction of Enbokuryu Artimus. Image credit: Ddinodan / Sci.News.
stegosaurus A group of armored, plant-eating dinosaurs that lived during the Jurassic and Cretaceous periods.
These dinosaurs were four-legged and reached a maximum length of about 9 meters (30 feet).
They had small heads, stake-like teeth, vertical bony plates and spines on their backs and tails, and hoof-like toes on all four limbs.
Dr. Lei Jia of the Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, and colleagues said, “Stegosaurs are a minor but iconic group of ornithischian dinosaurs.''
“They range from the Middle Jurassic to the Early Cretaceous, but are rare and poorly represented in the Cretaceous.”
“Until our study began, there were only four valid taxa from the Cretaceous. Palantdon, Verhosaurus homheni,Verhosaurus ordoseensis and Mongolostegus exspectabilis”
A new species from the Cretaceous period, Enbokuryu Artimuslived in what is now China from 113 million years ago to 100 million years ago.
The fossilized remains of this sword dragon were collected from the Zuoyun Formation in Zuoyun County, Shanxi Province, China.
“Enbokuryu Artimus “This is one of the most recent records of a stegosaur taxon in the world,” the paleontologists said.
“Compared to other sword dragons, Enbokuryu Artimus The dorsal vertebrae and iliosacral block have several unique features. ”
“The dorsal vertebrae have higher neural arches, smaller neural canals, and fewer fused vertebrae/sacral and fenestra/sacral ribs in the iliosacral block.”
“As a result of phylogenetic analysis, Enbokuryu Artimus It is recovered as a sister taxon of the clade containing. Stegosaurus Stenops and Vuelhosaurus homheni” they added.
“However, it differs from these two taxa in several anatomical features, including the dorsal sacral ribs, sacral ribs, caudal vertebrae, and ilium.”
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Ray Jia other. A new species of sword dragon from the Late Early Cretaceous period of Zuoyun City, Shanxi Province, China. historical biology, published online on January 31, 2024. doi: 10.1080/08912963.2024.2308214
Snow-white northern booby (Moras Bassanus) In this action-packed photo, a man dives for food in the icy waters off the coast of Scotland's Shetland Islands. The seabird is about the same size as an albatross, with a wingspan of up to 180 centimeters. They also have strong neck muscles and nostrils on the inside of their beaks that can close to prevent water from entering, making them uniquely adapted to high-speed diving.
This shot was one of the most spectacular in the 2024 Underwater Photographer of the Year competition, which celebrates the wonders of the marine world.here are some new scientistThese are carefully selected works from among the many entries.
Virgo Shipwreck near Recife, Brazil
Fabi Fregonesi/UPY 2024
In this photo by Fabiana Fregonesi, a school of fish swarms around a shipwreck, forming a shape that momentarily resembles a boat's sail. The ship, called Virgo, was intentionally sunk in 2017 to serve as a diving site near Recife, Brazil.
“At that moment, I knew the ship was ready to set sail and the journey into an unknown adventure began,” Fregonesi said in a statement.
gray whale eyes
Rafael Fernandez Caballero/UPY 2024
Eye of Eastern Gray Whale (Eschrichius Robtus) penetrates this mysterious shot taken from just above the surface of a saltwater lagoon in western Mexico. These marine giants are friendly creatures and often approach boats to show curiosity. Whales undertake the longest annual migration of any mammal, from their summer feeding grounds in the Arctic south along the west coast of North America to the warm lagoons of Baja California, Mexico.
Octopus ringed with pyrosomes
Dennis Corpus/UPY 2024
In contrast to the giant gray whales, this 10 centimeter wide creature was captured up close in the deep waters off the coast of the Philippines. The circular object in the image is a pyrosome. This is a colonial animal called a zooid, which is made up of hundreds or thousands of tiny individuals. Encased in a strange pyrosome, a tiny octopus peeks out.
diving cormorant
John Anderson/UPY 2024
This ravenous cormorant mistakes photographer John Anderson's camera for a fish and heads straight for it. This stunning image was taken on a bright summer afternoon in a kelp forest at a dive site in Monterey, California. Many cormorant species rely on these special marine ecosystems to survive. However, local kelp forests have declined by 80% over the past decade.
Comparisons are difficult because men’s brains tend to be larger than women’s.
Sergiy Tryapitsyn / Alamy
Are male and female brains that different? A new way to investigate this question has led us to the conclusion that they exist, but we need artificial intelligence (AI) to tell them apart.
The question of whether we can measure differences between male and female brains has long been debated, and previous studies have yielded conflicting results.
One problem is that men’s brains tend to be slightly larger than women’s. This is likely due to the fact that men are generally larger, and some previous studies have compared the size of various small areas of the brain. Unable to adjust whole brain volume. However, no clear findings have been made so far. “When you correct for brain size, the results change quite a bit,” he says. Vinod Menon at Stanford University in California.
To tackle this problem in a different way, Menon’s team used a relatively new method called dynamic functional connectivity fMRI. This involves recording the brain activity of people lying in a functional MRI scanner and tracking changes in how activity in different areas changes in sync with each other.
The researchers designed an AI to analyze these brain scans and trained it on the results of about 1,000 young people from an existing database in the United States called the Human Connectome Project, identifying which individuals are male and which individuals. told the AI whether the person was female. In this analysis, the brain was divided into 246 different regions.
After this training process, the AI was able to differentiate between a second set of brain scan data from the same 1000 men and women with approximately 90% accuracy.
More importantly, the AI was equally effective at differentiating male and female brain scans from two different, never-before-seen brain scan datasets. Both consisted of about 200 people of similar age, ranging in age from 20 to 35, from the United States and Germany.
“What we bring to the table is a more rigorous study with replication and generalization to other samples,” Menon says. None of the people in the training or testing data were transgender.
“Replication with a completely independent sample from the Human Connectome Project gives us even more confidence in our results,” he says. Camille Williams At the University of Texas at Austin.
The next question is whether the AI will be just as accurate when tested on an additional, larger set of brain scan results. “Time will tell what results we get with other datasets,” he says Menon.
If confirmed, the findings could help us understand why some medical conditions and forms of neurodiversity, such as depression, anxiety, and attention-deficit hyperactivity disorder, differ by gender. No, says Menon.
“If we don’t develop these gender-specific models, we will miss important aspects of differentiating factors.” [for example]”An autistic man and a control man, and an autistic woman and a control woman,” Menon said.
Since the beginning of time, men and women have tended to have different social roles, interests, and occupations. It is natural to think that perhaps these stem from innate differences in their brains and more obvious differences in their bodies. This idea has long been controversial, but now that ideas about gender are changing more rapidly than ever, the question of whether male and female brains are different has become more acute. There is. This remains a controversial issue even among neuroscientists. Nevertheless, they are finally cutting into historical discrimination and gender politics and trying to get to the truth.
Early measurements of skull volume showed that, on average, male brains are slightly larger and heavier than female brains. Some commentators argued that this “five ounce deficit” was the key to the man's superior abilities. In fact, the simple explanation is that the larger the body, the more brain tissue it requires to move it. This is a relationship found across animal species.
The situation became even more complicated in the 1990s with the advent of brain scanning technology, which suggested sex differences in the size of certain brain regions and structures. These findings often turned into compelling stories about, for example, why women are more empathetic on average or why men are more likely to become engineers. But studies from the early decades of brain scanning research should be taken with a pinch of salt, he says. leeds elliott at Rosalind Franklin University in Illinois. “When we control for brain size, all claims about volumetric differences in individual structures disappear…
People with high levels of niacin (also known as vitamin B3) in their blood may be more likely to have a heart attack or stroke than people with low levels of niacin. Consuming too much of this vitamin, which is routinely added to fortified foods and can also be taken as a supplement, can cause inflammation in blood vessels.
Heart attacks and strokes are the leading causes of death worldwide. Although researchers have made great strides over the past few decades in discovering risk factors for these conditions, they have not identified them all.
“If treated [high] cholesterol and [high] You can still have a heart attack even if you have high blood pressure, diabetes, or any other pre-existing risk factors. ”Stanley Hazen at the Cleveland Clinic in Ohio. “There's something we're missing.”
To fill these gaps, Hazen and his colleagues collected blood samples from 2,331 U.S. adults and 832 European adults who chose to undergo cardiovascular testing. The researchers analyzed the samples for substances called metabolites, which are byproducts of metabolic processes such as digestion. The researchers then tracked participants' occurrence of cardiac events, such as heart attacks and strokes, over a three-year period.
The researchers found that people with high levels of a metabolite called 4PY were, on average, about 60 percent more likely to experience such an event than those with lower levels. This compound only occurs when the body breaks down excess niacin.
Further experiments revealed that 4PY inflamed blood vessels in rodents. We know that inflammation is a major contributor to the development of heart disease, Hazen said.
It's not uncommon for people to have high niacin levels, he says. This is partly because certain foods, such as cereals and flour, are routinely fortified with vitamins in countries including the UK and US.
Niacin supplements are also becoming more popular Evidence suggests it has anti-aging effects says Hazen. Additionally, doctors stopped prescribing high doses of niacin to people at risk for cardiovascular disease because it was initially thought that the vitamin protected people from the risk of cardiovascular disease by lowering cholesterol. It happened recently.
“I think this study really shows that when it comes to vitamins, sometimes you can have too much of a good thing,” he says. Jenny Jia at Northwestern University in Chicago, Illinois.
However, this study was primarily conducted on people of European descent. So it's unclear whether similar results would occur in people of different racial or ethnic backgrounds, Zia said.
Artist's impression of record-breaking quasar J0529-4351
ESO/M.Kornmesser
A quasar 500 trillion times brighter than the Sun has earned the title of the brightest known object in the universe. It appears to be powered by a supermassive black hole that devours a sun-sized mass every day.
Quasars are the centers of galaxies where gas and dust falling into a supermassive black hole emit energy in the form of electromagnetic radiation. christian wolff Researchers at the Australian National University in Canberra will discover a new object called J0529-4351 in 2022 by scouring data from the Gaia Space Telescope and looking for extremely bright objects outside the Milky Way that have been mistaken for stars. The brightest quasar was discovered for the first time.
Follow-up observations from the Very Large Telescope (VLT) in Chile revealed that it is the brightest object in the universe as we know it.
Wolf and his colleagues used an instrument on the VLT called a spectrometer to analyze the light coming from J0529-4351 and calculate how much was produced by the black hole's swirling disk of gas and matter, called the accretion disk. did. This revealed that J0529-4351 is the fastest growing black hole in the universe, swallowing about 413 solar masses per year, or more than one sun per day.
Using the spectra of these lights, the researchers calculated that the mass of the black hole was between 5 billion and 50 billion solar masses.
Wolf and his colleagues also discovered the brightest quasar to date in 2018, about half as bright as J0529-4351. Wolf believes this new discovery is likely to account for most of the observable sky and remain the record holder for some time. Now, thanks to extensive star catalogs like those created by Gaia, they can be studied in great detail. “This is the largest unicorn we've ever found with the longest horn on its head. I don't think this record will ever be surpassed,” Wolf says.
The quasar's accretion disk appears to be the widest ever known, measuring 7 light-years in diameter. It says this provides a rare opportunity to directly image a black hole and precisely measure its mass. Christine Dunn At Durham University, UK. “This is large enough and bright enough that it can be solved with current equipment,” he says Done. “That means we can more directly measure the mass of this monster black hole. I was very excited about that.”
VLT is currently upgrading its spectroscopic equipment as part of the Gravity+ project, which should allow it to resolve the characteristics of J0529-4351 in detail. This means different parts of a quasar's accretion disk can be distinguished and better understood, but it could take several years, Dunn said.
It looked like a classic case of Alzheimer's disease. The man, in his 70s, had been experiencing severe cognitive decline for three years. Frequently forgetting the names of his family members, he was unable to drive or leave the house alone. Further deterioration seemed inevitable. But then his doctor tested him and found that his cerebrospinal fluid sample I noticed a fungus called Cryptococcus neoformans. They put him on antifungal medication and the results were amazing. Within two years he had his driver's license reinstated and returned to his job as a gardener.
Neuroscientists have long suspected that certain infections can increase the risk of dementia.For example, both Porphyromonas gingivalisthe bacteria behind periodontal disease, the herpes simplex virus that causes cold sores, It has been pointed out that there is a relationship with Alzheimer's disease.. However, cases of “reversible dementia” are emerging from the idea that our brains are teeming with microbes and that imbalances in this “brain microbiome” can make people more susceptible to neurodegenerative diseases. is beginning to arouse great interest.
Until recently, it was thought that the brain was free of microorganisms. This was especially due to the blood-brain barrier, a special membrane that protects pathogens and toxins in the blood from the brain. Therefore, the idea of a brain microbiome was controversial. But new research seems to confirm the case. Richard Leeds University of Edinburgh, UK and colleagues Analyzed data obtained from postmortem brains It is housed in four brain banks in the UK and US. They discovered a wide variety of microorganisms of different types.
Astronomers using the NASA/ESA Hubble Space Telescope have captured stunning images of the dwarf spiral galaxy IC 3476 in the constellation of Coma.
This Hubble image shows IC 3476, a dwarf spiral galaxy located 54 million light-years away in the constellation Coma. This image consists of observations made by Hubble's Altitude Survey Camera (ACS) in the near-infrared and optical parts of the spectrum. This is based on data obtained through his two filters. Color is obtained by assigning different hues to each monochromatic image associated with an individual filter. Image credit: NASA / ESA / Hubble / M. Sun.
IC 3476 It is located in the constellation Coma, approximately 54 million light-years from Earth.
This galaxy is first discovered It was proposed by German astronomer Arnold Schwassmann on November 22, 1900.
IC 3476, also known as IRAS 12301+1419 or LEDA 41608, is a member of the Virgo Cluster.
On the other hand, new Hubble images of the galaxy don't look quite as dramatic. The actual physical events occurring in IC 3476 are highly energetic.
“IC 3476 is undergoing a process known as ram pressure stripping, which promotes unusually high levels of star formation within the region of the galaxy itself,” the Hubble astronomers said.
“We tend to associate the letter 'ram' with the acronym RAM, which refers to random access memory in computing.”
“But ram pressure has a perfectly clear definition in physics: it is the pressure exerted on an object by the overall resistance of the fluid as it moves through some form of fluid.”
“If the entire galaxy is under ram pressure, then the galaxy is a 'celestial body', and the intergalactic medium or the intracluster medium (dust and gas that permeates the space between galaxies, in the latter case the intergalactic space) becomes a “celestial body”. fluid'. “
“Lamb pressure stripping occurs when gas is stripped from a galaxy by ram pressure,” the astronomers explained.
“Gas is absolutely key to star formation, so removing this gas could lead to reduced levels of star formation or even a complete cessation.”
“But the ram's pressure could also compress other parts of the galaxy, which could actually promote star formation.”
“This is what appears to be happening in IC 3476: no star formation appears to be occurring at the edges of the galaxy, which are bearing the brunt of the ram pressure separation, but in deeper regions of the galaxy, the rate of star formation slows down. It seems to be clearly above average. ”
The myth that we only use 10 percent of our brains has been completely debunked. Perhaps this idea persists because it is so tempting to believe that you can become a genius simply by learning how to tap into your dormant 90 percent. In reality, no part of your brain can keep up with demands, and your brain is always switched on, even when you're asleep or not thinking at all.
But that doesn't necessarily mean that your brain uses the same amount of energy while daydreaming as it does when you're concentrating. We've all experienced the feeling of being mentally exhausted after concentrating on a difficult problem. It certainly feels like a lot of work to think about it in detail, but is it really? The answer is more nuanced than you might think.
It is true that the brain is a starving organ. “It's the most energy-intensive part of your body,” he says. Nili Ravi At University College London. It makes up about 2% of your body weight, but consumes about 20% of your energy at rest.
Most of this energy is used to maintain varying levels of electrical charge across the neuron's membrane. This unbalanced state must be restored after the neuron fires the signal. “That requires a lot of fuel,” he says. Ewan McNay at the University at Albany in New York.
Interestingly, when it comes to energy use, the brain doesn't differentiate between tasks we traditionally think of as “difficult” and tasks that come more naturally. This was the first…
Space dust may have brought elements essential for life to early Earth. Our planet is relatively poor in some of the elements necessary for the chemical reactions of life, but the dust that constantly drifts in from space contains many more, and when the Earth was young it was covered with glaciers. It is possible that they were gathered in
“It’s always been a shadow idea, but people were ignoring it for a number of reasons. The biggest one was that there weren’t enough ideas anywhere,” he said. say. craig walton at Cambridge University. Space dust tends to be rich in elements that are relatively difficult to obtain on Earth, such as phosphorus and sulfur, and it constantly falls in thin layers around the world.
Until now, researchers exploring the origins of such elements on Earth have focused primarily on larger objects that can deliver more elements at once, but such delivery mechanisms were They may have a hard time maintaining their pre-biological chemistry long enough to do so, Walton says. “Meteorites have long been thought to be a great source of these elements, but they release them randomly,” he says. “It’s like if I give you a big feast once, but you never eat again, you’re going to have a hard time living a happy life. You need a continuous source, and that’s what happens. It’s space dust.”
Up to 40,000 tons of space dust falls on Earth every year. Billions of years ago, that number may have been between 10 and 10,000 times higher, but that was still not enough to make individual locations particularly rich in elements important to life. Walton and his colleagues simulated how wind and water move dust and collect it in concentrations high enough to support life.
They found that glaciers are the most promising environment because they have the potential to trap large amounts of dust and are very less contaminated by dirt on land. When space dust falls on a glacier, it absorbs sunlight and heats up, melting and creating tiny holes in the ice. The hole then continues to trap more dust. Finally, the dust chamber flows into a pond at the edge of the glacier.
We can still see this process happening today, but if the Earth had been cold enough to have glaciers billions of years ago, the amount of dust would have increased and it would have been even more efficient. . “If you want to produce deposits that are really rich and have a lot of reactions that could lead to life, this is the best way to do it,” Walton says.
“We don’t know if glaciers were common on early Earth; we just don’t have good data for this period in general,” he says. ben pierce at Johns Hopkins University in Maryland. “But I think it’s worth investigating, especially if it has the potential to provide a mechanism for creating a rich primordial soup.”
The lack of data about conditions on Earth during this time makes it difficult to estimate how important cosmic dust was to the origin of life. “We’ve always had a hard time understanding what the bulk chemistry of early Earth was like,” he says. Matthew Pasek at the University of South Florida. “However, this could be an important source of extremely valuable material.”
The Flegraean Fields (also known as Campi Flegrei in Italian) are active volcanic fields near Naples, Italy. Unlike nearby Mount Vesuvius, Campi Flegrei does not have a single volcano. It is rather a volcanic system, with several centers located within sunken areas called calderas (essentially deep sinkholes or cauldrons).
Campi Flegrei is surrounded by suburbs and densely populated areas near the city of Pozzuoli. After a period of relative quiet and peace for the past 40 years, things began to change in September 2023.
Earthquakes began to be felt in Campi Flegrei in September 2023. Since then, more than 1,100 earthquakes have been recorded, some reaching 4.2 on the Richter scale. This caused the height of the ground to change. It is a process known as “Gradual earthquake“. The region has been affected by this phenomenon before, most recently from 1968 to 1972 and then again from 1982 to 1984.
Gradual earthquakes can cause the Earth’s surface to rise or fall when magma chambers buried 3 to 4 kilometers deep fill and empty in cycles of uplift and subsidence. This process causes the earthquakes felt by residents here.
However, the people who live here do not care about it, thinking that it is the “breath of the volcano” that lies beneath their eyes. Still, volcanologists have been studying calderas to predict what will happen in the future to avoid potential disasters.
Pisciarelli fumarole
Gases and steam are released from the Pisciarelli fumarole in Pozzuoli, Naples.Photo credit: Luigi Avantaggiato
fumaroles such as Pisciarelli fumarole, a vent on the earth’s surface that releases steam and hot volcanic gases such as sulfur dioxide and carbon dioxide. These can occur as holes, cracks, and fissures near active volcanoes or in areas where magma has risen into the Earth’s crust without erupting.
temple of serapis
The Temple of Serapis, a Roman market building in the Italian city of Pozzuoli, is surrounded by more modern buildings. Photo credit: Luigi Avantaggiato
The Temple of Serapis in Pozzuoli (which was a market building rather than a temple) is considered an emblematic monument of the Campi Flegrei region. It is a symbol of volcanic gradual earthquakes in this region. The ground beneath the surface is either rising or sinking, so it can be completely dry or half submerged in seawater.
The study of slow earthquakes over the past centuries has been made possible thanks to observations such as those made on the ruins of this Roman building. For example, by studying holes drilled into ancient columns by marine molluscs over centuries, scientists can study changes in sea levels at this site.
There are billions of coffee lovers around the world. Whether it’s the comforting routine of brewing a cup at home or the need for a coffee shop next to the office, it has permeated our daily lives.
However, something as popular as coffee is fraught with mysteries. It’s a mix of facts, myths, and general rules of thumb that leaves some ambiguity as to what is actually the right way to do things.
How should I store coffee? Are you brewing correctly? Is decaf coffee completely decaffeinated? We spoke to Dr. Christopher Hendon, a computational materials scientist, who answers your most pressing questions about your cup of joe.
1. Pre-ground coffee and instant coffee actually have different levels of caffeine
Realistically, one of the best things you can do to make coffee at home is to grind your own beans. However, this is time consuming and can be quite expensive depending on the equipment.
If you opt for pre-ground coffee from the supermarket instead, will you succumb to the caffeine surge, or will it be exactly the same?
“No appreciable amount of caffeine is lost in the grinding process. However, pre-ground coffee sold in supermarkets typically contains less Robusta than Arabica,” says Hendon. According to him, the two main types of coffee beans used in commercial coffee production are Robusta and Arabica. Arabica beans are low in caffeine.
“But the problem with this is that it’s hard to know exactly what’s in a coffee blend. Since they don’t usually say it on the label, supermarket coffee is the best choice, following your own preferences. .”
Instant coffee is a different story. Depending on the processing method, it’s quite low in caffeine (often less than half) than any form of coffee powder.
2. Coffee should not be stored in the refrigerator
What is the meaning of life? Is free will an illusion? Should coffee be stored in the refrigerator? A question that philosophers have been asking for decades…perhaps. We don’t have an answer for the first two of his, but we can address the third.
and attempt is the keyword here, but it’s surprisingly difficult to understand. The question of where to store your coffee is hotly debated and there are many caveats, so let’s get straight to the point.
The main problem with storing coffee in the refrigerator or freezer is moisture. Coffee grounds should be kept dry, but the refrigerator isn’t necessarily the driest place. Therefore, if you store coffee in the refrigerator, it should be stored in an airtight container to avoid moisture.
“Coffee is primarily a kind of nasal sensory experience. When you take a sip, a lot of the flavor comes from the tongue and the back of your nose. The molecules that give you that experience are very volatile and easily evaporate. Coffee “loses those molecules over time if you keep it outside, and higher temperatures accelerate that process,” Hendon says.
There are a few things to note here. First, this only applies to people who are concerned about optimal flavor, and probably only high-quality beans that they plan to grind at home.
Next, you need to store your coffee at a low enough temperature to make a difference. In other words, your refrigerator isn’t cold enough to store your coffee. A freezer is required to achieve this result.
So, is it worth it? In addition to the aforementioned benefits, freezing coffee beans allows for a coarser grind than room temperature coffee, allowing you to grind the coffee in a more uniform manner.
It’s worth mentioning that these are somewhat minor details and not all experts agree on this. What most people advise is to store your coffee in a cupboard or somewhere at room temperature. As with most things when it comes to coffee, it’s all about experimenting to get the best results.
3. Cold beer doesn’t contain a lot of caffeine.
The cold brew is popular as it is perfect for coffee on a summer day. It’s often said that cold brew has a much higher caffeine content than regular hot coffee, but is that actually true?
“Hot coffee contains about twice as much caffeine. The reason is that temperature limits the amount of caffeine that can be extracted at lower temperatures. The higher you go, the more You can get out of it,” Hendon says.
A man pours milk into a glass of cold brew coffee – Credit: RyanJLane
“It’s not that it doesn’t have a lot of caffeine, but it’s not because of the brewing method. It’s because when you make cold brew concentrate, the ratio of coffee to water is very high.”
Concentrated cold brew beer is rarely offered. Usually diluted with water or mixed with milk, the average cold brew has less caffeine than a hot drink.
4. Coffee cannot be burned
A common complaint about coffee is that it’s “burnt.” This could be from a coffee shop or a cup made at home. So, is this taste caused by boiling the coffee in too hot water?
Once the coffee is roasted, it is dropped into a heated drum and over time the coffee begins to cook, turning yellow and then brown. If you simmer it for too long, it will eventually turn black.
This black bean is a dark roasted coffee. To reach this point, the beans must be cooked to about 220°C. This is a temperature well above the boiling point of the water used to make coffee.
“When you brew coffee, you can never bring that coffee back to the temperature it reached when roasting, so it’s impossible to burn the coffee during the brewing process,” says Hendon.
“However, the coffee comes out of the roaster, and burnt-tasting molecules may already be in the coffee. Depending on how you brew it, you can enjoy these flavors and Some coffee shops prefer these flavors and they are popular among many people.”
If you often drink coffee with a burnt flavor, but that’s not the flavor you like, a lighter roast will make it less likely to feature that flavor.
5. Decaf does not mean caffeine free
Just like non-alcoholic beer, decaffeinated coffee is still coffee, and it will contain small samples of caffeine, one of coffee’s main components. But is it a tangible amount?
“Depending on how the coffee is processed, the decaffeination process is in principle very close to 100% removal of caffeine. However, all the samples we have tested to date still contain some amount of caffeine. volume,” says Hendon.
In other words, coffee may contain some caffeine, but not enough to be noticeable or to affect the person drinking it.
6. Light and dark roast coffee have similar caffeine levels
When you browse the coffee aisle at the supermarket or scan the menu at your local coffee shop, you probably want to consider light or dark roast options.
Which is best for the most intense caffeine? Some say dark roast is better here, but it doesn’t really matter.
“scientific literature This suggests that even if there are variations between crops and beans, all of them will come out if washed. There’s not much of a difference here,” says Hendon.
“There seems to be variation in caffeine depending on roast profile and region, but it’s certainly not consistent enough to be noticeable.”
The only difference from roast is the flavor. Lighter roasts are often more delicate, but more complex. However, darker roasts are often said to have simpler tones and “deeper” flavors. This can taste like the more bitter of the two.
7. Coffee taste greatly Depends on the bean
Coffee has a very personal taste, and not everyone likes the same taste. There’s intense flavor, fruity-tasting beans, good old fashioned black coffee, and of course the infamous Frappuccino…but what exactly is the best coffee, scientifically speaking?
“Coffee associations around the world have score sheets to identify high-quality coffee. Two of the most important parameters are perceived acidity and sweetness,” says Hendon.
“In fact, the ones that tend to score very high each year are Colombian-Panamanian and Ethiopian, which taste like a bouquet of sour flowers. These tend to fetch the highest prices and average It’s completely different from high-end coffee.”
You’ve probably seen the five love languages before, whether it’s on an online dating profile, a glossy magazine, or a viral TikTok video.
The theory behind it, created by American couples counselor Gary Chapman, claims that there are five “languages” that romantic partners use to communicate their love. It’s words of affirmation, quality time, gifts, acts of service, and physical touch. According to Chapman, problems in relationships can be caused by not communicating in the same “love language.”
But is there any science behind this theory? Do couples need to have compatible love languages to be happy?
“There’s no psychological evidence to suggest they actually exist,” he says Dr. Martin Graf, an academic psychologist who studies the psychology of romantic relationships. “If you look at it, [the theory] Intuitively it seems very plausible, and there are one or two studies that might support this whole concept a little bit, but there isn’t much scientific support for this idea. “
read more:
Although there is no evidence to fully support Chapman’s five languages, various theories of relationship behavior suggest that the following may be the case. three, Six or Seven One of them. It is also unlikely that there is only one preference. Sometimes they want physical touch, but in other situations they want to spend quality time with their partner.
Moreover, we are not always good at knowing which language we want. In one 2013 study, participants selected the love language they felt most applicable to themselves and answered a series of questions designed to elicit their language preferences. of language. However, the relationship between People said what their preferred language was, but the answer didn’t matter: For example, someone might say that their love language is “physical touch,” but say they feel more loved when their partner gives them a gift.
This same study also found no significant results when researchers compared language-matched and language-matched couples and their relationship satisfaction. Sharing a love language doesn’t necessarily make you happy (Another study in 2017 came to the same conclusion.).
However, similar relationships yield better results. If you have a conflict over values or handle the conflict in completely different ways; less likely to report relationship satisfaction.
“We’ve found that romantic couples who share similar core values, such as ethical views, political views, and the way they raise their children, tend to be more compatible,” Graf says.
So “birds of a feather flock together” is a better expression of what we look for in a long-term partner than “opposites attract.” But when we asked a sample of more than 1,600 couples about their personalities, we found that No association was found between similarity and overall life satisfaction. Given that our romantic relationships are influenced by other things that affect our life satisfaction and happiness, it’s clear that similarity alone is not enough to guarantee a happy relationship (or life). Of course.
Despite the lack of evidence to support or disprove Chapman’s theory, it’s still helpful to think about your own wants and needs in a relationship and talk about it with your partner. We often fall prey to cognitive biases known as “cognitive biases.” false consensus effectwhere we assume that others act and want the same things as we do.
Our preferences can change over time. What you consider important in a relationship today may seem superficial in 20 years. In the past, marrying for love may not have been as important as marrying for financial security; Love is now at the top of the list for most people.
About our experts
Dr Martin Graf is a Senior Lecturer in Psychology at the University of South Wales, UK. His main research interests are the psychology of romantic relationships, online dating, and social media. His research has been published in the following journals: technology, mind, behavior, nova science and Cyberpsychology, behavior, and social networking.
We naturally detect lies all the time. It can be a drop in our partner's voice that alerts us to the fact that they are hiding their feelings. The eyes of a child return to the drawer containing the present they are not allowed to open. Or the incredible story told by a colleague trying to explain why the company's petty cash went missing.
However, we often cannot see through the lies. why? Researchers have been trying to answer this question for more than a century, but liars still slip through our hands. But the latest research may help shed light on where we went wrong.
But first they needed to determine exactly what a lie was. We might use the word “lie” to refer to someone who says they look good in clothes they don't know whether they fit, a partner who seems to be trying to hide an affair, or a murderer who claims to be innocent. yeah. But are they comparable? Surely some lies carry more weight than others? Luke likes to distinguish between “white” lies and what he calls deception.
“The structure of deception is more complex than many people think,” he says. “There may be a variety of psychological processes underlying it. We're not talking about the same thing. Even superficial things like the length and type of communication are important.”
Whether you're texting a lie or telling someone a lie to their face, Luke says the core of deception is a deliberate attempt to mislead another person. But determining what is a lie is another thing. Detecting it is another thing entirely. Is there really a surefire clue to someone else's deception?
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Can you spot a liar just by looking at their eyes?
A common belief is that people who lie are reluctant to meet the gaze of others. Still, in the Gothenburg study, 82 percent of experts agreed that people who lie are less likely to avoid eye contact or look away than people who tell the truth.
“Empirical research on deception detection is vast,” he says. Per Anders Grand Hug, professor of psychology at the University of Gothenburg and one of the co-authors of the study. “But the one issue most experts agree on is that gaze aversion is not a diagnostic clue for deception.”
Similarly, 70% of experts agreed that liars appear no more nervous than truth tellers. This may be surprising since nervousness and gaze aversion are two of her four main behaviors that a liar exhibits.
Photo courtesy of Getty Images, Alamy. Image manipulation: Andy Potts.
Other traditional indicators include that liars continually change their posture, touch their body frequently, and offer explanations that are less plausible, logical, or consistent than they would be if they were telling the truth. There are things to do.
These beliefs are also based on shaky empirical evidence. The researchers investigated deception and fidgeting (body movements), how long subjects took to answer questions (response latency), and whether subjects' explanations were consistent, meaningful, and easily expressed ( found that the relationship between fluency and fluency was not clear. cut. Some experts said liars do these things more, some less, and others said there was no difference.
read more:
words are important
Professor Aldert FreiThe University of Portsmouth expert on the psychology of deception, who was not involved in the Gothenburg study, said the most widespread misconception about deception was “the idea that nonverbal lie detection works”. ing.
He suggests that people who try to use nonverbal lie detection methods, even if those methods include polygraphs, video analysis, taking brain “fingerprints” using neuroimaging equipment, or using audio Even if it involves technologies such as change exploration, it means we need to proceed with caution. Pitch – These are all controversial areas in deception detection research.
is that so Any What is an effective way to spot a liar? According to Luke, he has one promising lead. It's the lack of detail. About 72% of experts agreed that people who lie provide less detailed information than people who tell the truth.
Vrij agreed, saying that instead of looking at how people behave, find out what they say. He said there are several linguistic indicators, such as the number of details or “complexity” that appear in the subjects' statements.
…
Despite problems associated with purported behavioral cues, such as gaze aversion, many practitioners are reluctant to replace them with more useful cues based on what the suspect says. , says Vrij. Old myths and methods slowly disappear.
“The most annoying thing is the assumptions that come from the TV programs that lead the general public.” [and] “Experts believe they can catch individual liars.” Professor Amina Memon He is a professor at the University of London, a leading expert on lie detection and interrogation, and one of the co-authors of the Gothenburg study.
Police who have a hunch about a suspect based on a typical profile of a liar may use coercive tactics such as getting innocent people to confess to crimes they did not commit. For this reason, Memon advocates interviewing with a neutral, fact-finding approach, rather than guessing whether someone is lying.
Photo courtesy of Getty Images, Alamy. Image manipulation: Andy Potts.
But behind all this lies a bigger problem. Perhaps the reason we haven't found universal clues to deception is because they simply don't exist.
Over the past century, researchers have almost exclusively adopted what is known as the non-theoretical approach. This means they are looking for the “laws” of deception, the clues that everyone shows. But perhaps the reason this kind of one-size-fits-all approach doesn't work is simply because everyone lies differently.
Poker players apply this logic when looking for other players' “tells,” actions that indicate whether that person is bluffing or not. Tellurium varies from person to person, so some people may scratch their nose when their hands are not feeling well, others may cough more, and others may seem calmer than usual.
Even if you throw these three people into a research setting, a theoretical approach will not work. These differences appear to be just noise.
Signs of lying
If we want to understand the cues, Luke argues, researchers need to take an “ideographic” approach and focus on what makes each individual unique. This involves creating a personal profile of how each person lies about the same types of things and in similar situations.
“Testing the same people under different conditions (a so-called 'repeated measures' experimental design) is the best approach,” Memon says.
It remains to be seen how researchers will overcome the logical hurdles, but it seems clear that the science of lie detection is changing. It's time to move away from what Luke calls “crude averages.” “People are a little too fascinated by cool tricks to spot someone's lies,” he says.
Importantly, researchers studying deception have repeatedly found that evidence from controlled environments shows that most people are bad at detecting lies. is. Liars are able to escape detection in part because they know and exploit stereotypes.
Photo courtesy of Getty Images, Alamy. Image manipulation: Andy Potts.
Our confirmation bias can also make us overconfident. We remember a disproportionate amount of the times when we caught a liar, and we don't notice the times when we didn't lie at all.
Even if we succeed, Luke is not convinced that the clues we think we used are really the keys we used to unlock the truth.
“Remember the last time you caught someone in a lie? How did you know?” he asks. “It probably wasn't because they were looking up and left. They probably had some kind of evidence, like receipts, text messages, witnesses. These are things that make people wonder if someone is offering the truth. That’s how we tend to actually judge whether or not.”
Even in the absence of concrete external evidence, it may be possible to assess situational factors. “In the real world, we can often understand to some extent why people would want to lie,” Luke says.
When someone we know is lying, we can better guess from subtle cues such as their gaze because we know them well. In these situations, Luke says it's best to read the situation better than the other person and try to understand their motives.
The key message is that behavioral cues to deception may exist, but they are likely to be highly personal. “It's better to trust your own detective work and check what people say against the evidence,” says Luke.
Fixed cues won't work. In fact, it can make it even harder to spot a liar. And what if no evidence is found? Luke's advice is simple. “Proceed with caution.”
Cutting, biting, slashing, and cannibalism are not words that we naturally associate with love. But there is beauty and splendor in the dark side of animal mating, too.
This article takes a closer look at eight of the strangest courtship behaviors in the animal kingdom.
Some male anglerfish often attach themselves to passing females, reducing them to little more than brainless sperm sacs. This is called “parabiosis,” where two organisms combine to develop a shared physiological system. Monkfish are the only known example of symbiotic symbiosis in nature.
Anglerfish develop symbiotic relationships in response to the vastness of the deep sea, where encounters between the sexes are rare and rare. A male bites the first female he encounters because it’s a safer choice than gambling with another female who may never arrive.
Biologists to investigate how anglerfish achieve symbiosis Dr. Thomas Boehm Researchers at the Max Planck Institute for Immunobiology and Epigenetics in Germany tested the DNA of 31 specimens from 10 species of monkfish.
They discovered that the monkfish species, which are fused male and female, lack important immune system genes. Somehow they are compromising the immune system to allow parabiosis without suffering any negative effects.
Understanding how anglerfish manage this trick could facilitate future blood transfusions and organ transplants and have important implications for medicine.
Snakes have two penises instead of just one. These organs, known as hemipenes, allow male snakes to mate with snakes from various directions. This is especially useful for red-sided garter snakes, which form chaotic “mating balls” during mating season in which males outnumber females 100 to 1.
This situation occurs because male snakes wake up from hibernation before females, causing a temporary imbalance in the sex ratio.
To increase the probability of mating success, the hemipenes of many reptile species have evolved complex spines that lock into place during copulation. In red-sided garter snakes, the hemipenis has a large spine that is inserted into the female during copulation.
This finding suggests that by contracting the genital opening and vagina, females may be able to forcefully reject male advances and thwart an unworthy partner’s chances of success.
Earlier this year, scientists discovered a type of nudibranch (Siphopterone Maxig) It stabs the partner directly in the center of the head with poisonous spurs, in the throes of love.
This spur (attached to the penis), called a penile stylet, injects a complex cocktail of hormones directly into the lover’s brain, increasing the odds of a successful copulation.
This is just one of the many reproductive oddities that nudibranchs have evolved. Some nudibranchs even “kiss” their bodies mouth-to-mouth before transferring their sperm. After mating, sea slugs can also “cuddle” by wrapping their colorful bodies around each other.
“Maybe ‘hugging’ is akin to protecting your spouse,” he says. Cheyenne Tatean experienced sea slug observer at the University of Massachusetts Amherst.
“The threat to their reproductive success is that their sperm gets digested by their partner before it can be used for fertilization. And ‘hugging’ gives sperm a chance to travel deeper within their partner’s reproductive tract. You can get it. ”
Most people think that sea slugs, like many invertebrates, are primitive lower orders of bony animals with large brains. Their rich and duplicitous sex lives suggest otherwise.
The case of male spiders is complicated. To prepare for sex, they must first ejaculate onto a small web and then collect the semen in a pair of syringe-like appendages near their mouth known as palps.
Locked and loaded, the male spider must approach the female and insert its antennae into the female’s reproductive passageway, being careful not to activate the predatory kill reflex. The female’s reproductive tract happens to be just a few millimeters from the venomous fangs.
To limit the chance of being eaten, male spiders have evolved complex dances to clearly communicate their sexual intentions.
Some offer gifts to the female to keep her entertained while the sperm transfer takes place. But male redback spiders go one step further: During mating, the male somersaults balletically into the female’s jaw, encouraging her to bite.
During courtship, some species of snails periodically fire chemical-tipped arrows at each other, like the garden snail pictured here.
And since snails have both female and male reproductive organs, these arrows (or “love darts”) often fly in both directions.
“The purpose of the love dart is not to kill the mate, but to introduce bioactive substances that affect the mate’s reproductive process,” states Dr. Joris M. Corne of the Amsterdam Institute for Life and Environmental Research.
The substances contained in love darts contain a rich cocktail of special compounds (known as allomones) that prevent sperm from being lost within the reproductive tract of a potential mate if mating takes place.
Each species of snail has its own unique shape. Some love darts are curved like a harpoon. Some have thorns. Some have diamond-shaped tips, like decorated spears.
Can misfires cause fatalities? “I’ve occasionally seen darts go straight into the recipient’s head, and the recipient survived.” says Joris M. Corne.
“Cannibalism has its advantages,” says Nathan Burke, a postdoctoral researcher at the University of Hamburg, who studies the mating strategies of praying mantises.
“It can lead to improved growth, condition and reproduction in cannibals. What makes many praying mantises and spiders different from other cannibals is that they also cannibalize in mating situations, usually eating the male. That means it’s only female.”
Burke is particularly interested in the wrestling matches that some praying mantis species engage in before mating. Wrestling matches involve violent grappling and violent contests between males and females who scrape their paws together.
If the female wins these struggles, the male will almost certainly be eaten. However, if the male wins, there is a good chance of mating.
Why sexual cannibalism is so rare among insects remains a subject of debate.
“The thing about praying mantises is that they are mostly sit-and-wait predators. They don’t move around looking for food, they patiently wait for food to come to them,” says Burke.
“This sit-and-wait lifestyle may be a pre-adaptation for sexual cannibalism.”
This may explain why cannibalism occurs in other sit-and-wait predators such as spiders.
A seed beetle’s penis, which has hundreds of sharp spines whose purpose is to scratch and tear the female’s reproductive organs, makes no sense at all.
After all, how does a penis gene that damages a woman’s reproductive tract spread throughout a population?
A female stag beetle that mated with a male with long spines produced sons with the same long spines. However, their daughters also appeared to have inherited some valuable traits.
On average, they were larger and produced more eggs during their lifetime.
About our experts
Dr. Joris M. CorneAssociate Professor at the Amsterdam Institute for Life and Environmental Research. His research focuses on simultaneous reproduction in hermaphrodites. His research has been published in several peer-reviewed journals, including PLoS ONE and Current Biology.
Dr. Nathan BurkeHe is an evolutionary ecologist and Alexander von Humboldt Postdoctoral Fellow at the University of Hamburg, Germany. His research investigates sexual antagonism in the springbok mantis (Myomantis cafra).
Dr. Cheyenne TateI am a postdoctoral fellow at the University of Massachusetts, Amherst. She received her PhD from the University of Notre Dame in 2019.
Today, not one, but five asteroids are hurtling past Earth, all at their closest approach.
The largest one was discovered just a few weeks ago. Potentially Dangerous 2024 BR4. Measuring between 140 and 300 meters in length, it is a sizable chunk of space rock. At its highest estimate, it would be about the size of an oil tanker, six Olympic-sized swimming pools, or as tall as New York City's Chrysler Building.
And just like the box of chocolates you might stuff your cheeks with, we have a few more surprises in store for you on the day. Dr. Darren Baskillan astronomer at the University of Sussex, said:
“On Wednesday, February 14, 2024, a total of five asteroids will pass Earth, all within 5 million kilometers.”
It may seem like a long way, but from an astronomical perspective, it's just a stone's throw away.
“The closest of these five is asteroid 2024 CU1, which is scheduled to pass about 52 percent further away than the Moon and is about 20 meters in diameter.”
In 2024, CU1 will be closest at 1:31 PM GMT (+/- 1 minute). However, it is only 20 meters in diameter, much smaller than the much talked about “city killer” called 2024 BR4.
How close will asteroid 2024 BR4 get?
Asteroid 2024 BR4, one of a group of asteroids that will fly past Earth today, will make its closest approach at a distance of 4.6 million km (2.86 million miles). In terms of AU, this is approximately 0.03 AU, well within the criteria for designation as a potentially hazardous object (see Meaning of a “Potentially Hazardous” Asteroid below).
(To convert kilometers per mile to AU, divide the distance in kilometers per mile by the distance in 1 AU of the same unit.)
Closest approach is expected to occur at 11:03 GMT today (±1 minute).
Will asteroid 2024 BR4 collide with Earth?
The Valentine's Day asteroid is hurtling through space at about 44,880 kilometers per hour (27,887 miles per hour), only slightly faster than the average speed recorded by Galileo during his six-year mission to Jupiter, but we… No need to worry. About influencing our heavenly oasis.
It passes us safely and poses no immediate threat to Earth.
“Asteroid 2024 BR4 will pass close to Earth 12 times further away than the Moon,” Baskill explains.
What do we know about Asteroid 2024 BR4?
Unfortunately, there are very few. In general, the larger the object, the brighter it is (the brighter the object, the lower the magnitude). NASA assigned asteroid 2024 BR4 a magnitude of 21.457.. It's not very bright.
However, we also need to know the object's albedo (surface reflectance), which is currently unknown. Current best estimates place the asteroid's size between 140 and 300 meters in diameter. But we know its trajectory with relative certainty. And today's visit will bring us the closest in 120 years to realizing BR4 in 2024.
Have you ever tapped someone on the far shoulder only to see them spin the wrong way, and then do it again immediately? Why is this funny? You might think that it’s an inherent human trait to find things like this funny, and that complex communication and context are needed for a gag to work, but you’d be wrong.
New research published in today’s journal Proceedings of the Royal Society Bfound evidence of monkey business (sorry) in four species of great apes, shedding light on the evolutionary origins of humor.
The findings suggest that the playful teasing exhibited by 8-month-old human children may have deeper roots in our primate relatives than previously thought.
Such behavior involves intentionally subverting the expectations of others. Examples include repeatedly offering and withdrawing goods, or intentionally disrupting another person’s activities by creating an element of surprise.
To understand these behaviors, the researchers observed spontaneous social interactions among populations of orangutans, chimpanzees, bonobos, and gorillas. They in turn analyzed everything from the teasing person’s body movements and facial expressions to how the target of the teasing (the teasing person?) reacts.
In addition to this, the researchers investigated whether the teasing behavior was targeted at specific individuals, whether it continued or escalated over time, and whether the teasing behavior was waiting for a response from the target. We tried to investigate the intentions behind the teasing.
“Our findings support the idea that teasing great apes is a provocative, purposeful, and often playful behavior.” Isabel Romersaid the postdoctoral researcher and lead author of the study. BBC Science Focus. “It is usually asymmetric and can take a variety of forms with varying proportions of playful and aggressive characteristics.”
In total, the researchers identified 18 distinct teasing behaviors. These include repeatedly shaking or brandishing objects in the center of the target’s visual field, hitting or poking them, staring into their faces, and pulling their hair. How fascinating!
Unlike play exhibited by all animals in the animal kingdom, playful teasing has several unique characteristics. “Apes’ playful teasing is one-sided and mostly comes from teasing,” he explained. Erica Cartmill Senior author of the study.
“Animals also rarely use play cues, such as the primate ‘play face,’ which resembles what we call a smile, or the ‘grasping’ gesture that signals intent to play,” she continued. Ta.
Cartmill recalled seeing such behavior in apes for the first time in 2006. Then he observed a young orangutan begging his mother by repeatedly waving a stick in front of her. “It didn’t look like a joke that would fit in a stand-up special on Netflix, but it seemed like a simple joke that could be used with young human children,” she said.
Almost 20 years after this interaction, this research has provided important insights not only into great ape behavior but also into our own behavior. “Depending on the species, great apes share 97 to 99 percent of our DNA, so we have a lot in common,” Romer said.
“The existence of playful teasing in all four great apes, and its similarity to playful teasing behavior in human infants, suggests that playful teasing and its cognitive prerequisites may have been associated with the last human species at least 13 million years ago. This suggests that it may have existed in a common ancestor.
Going forward, Romer and her team will investigate whether other primates and large-brained animals tease each other in hopes of better understanding the evolution of this important (and highly entertaining) behavior. intend to do something.
About our experts
Isabel Romer I am a postdoctoral researcher at the Max Planck Institute for Animal Behavior in Radolfzell/Konstanz. She is a primatologist and cognitive biologist with 10 years of experience studying great apes and Goffin parrots. Her main research areas are within physical cognition, tool use and manufacturing, tool innovation, template matching from memory, flexible multidimensional decision making based on reward quality and tool functionality. is focused on. Her work also delves into social cognition, exploring prosociality, aversion to inequality, delay of gratification, theory of mind, and playful teasing with these animal subjects. .
Erica Cartmill He is a professor of anthropology, cognitive science, and ethology at Indiana University. Her research bridges the fields of biology and linguistics, using both comparative and developmental methods to examine communication. Her research with great apes and humans includes observing spontaneous interactions between communication partners and employing communication games that allow for more controlled experiments. Her research focuses specifically on whether gestures played a role in the origin of human language.
The early crescent phase of the moon following the new moon is well located in the early spring evening sky. From February to March, the spring crescent moon looks very beautiful in the evening glow.
If you have binoculars or a small telescope, there are some things to keep in mind. Known as the clair-obscure effect, or trick of the light, this effect causes recognizable shapes to appear within a jumbled area of moonlight and shadow. Two popular examples are known as Moons X and V. These occur simultaneously at different locations along the moon’s terminator (the line that separates night and day).
We spot them in the daytime sky around 12:40 a.m. on February 17th and again at 2:20 p.m. on March 17th. The effect lasts only a few hours.
Another striking Clair Obscure effect is the Jeweled Handle. This occurs a few days after the waxing moon, when the crooked peaks of the Montes Jura (Jura Mountains) are illuminated at dawn.
These Clare Obscure effects, or tricks of light, will be visible over the next month. Go outside on a sunny day and watch them. – Image credit: Pete Lawrence
Its unique arc appears to extend into the lunar night. This can be seen with just a keen eye, but is best seen with optical aids. The jeweled handle is best observed during daylight hours on February 19 at 3:50 p.m.
If the evening of March 13 is clear, the waxing moon will appear near bright Jupiter. If the skies are clear and you can see it with just your eyes, it’s a spectacular sight.
Speaking of eyes, if you have a small telescope, look at the southern part of the moon in a few days, on March 18th. Just before 8 p.m., the oval exterior of Clavius, the large crater, is mostly dark and shrouded in shadow.
Two exceptions are the raised crater rims that are illuminated within them. These form another perspective effect known as the Eye of Clavius.
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