Saturn’s Moon Titan Could Harbor an Unforeseen Blend of Hydrogen Cyanide and Hydrocarbons

Titan serves as an intriguing subject for in-depth investigations of organic chemistry under unusual conditions. This Saturnian moon is abundant in nonpolar hydrocarbons like ethane and methane, alongside hydrogen cyanide (HCN), a highly relevant small polar molecule in prebiotic chemistry. Recent studies show that these notably polar compounds can mix at low temperatures, creating structures that challenge traditional chemical theories.

Artistic rendering of Kraken Mare, Titan’s extensive ocean of liquid methane. Image credit: NASA’s John Glenn Research Center.

Hydrogen cyanide is commonly found in the astrochemical landscape and has been detected in numerous celestial bodies, including the interstellar medium, comets, planets, moons, and dwarf planets.

This molecule ranks as the second most prevalent product anticipated from Titan’s atmospheric chemistry.

Dr. Martin Rahm, a researcher from Chalmers University of Technology, stated: “These remarkable discoveries enhance our understanding of something vast—a moon comparable in size to Mercury.”

In laboratory experiments, Rahm and his team combined hydrogen cyanide with methane and ethane at temperatures as low as 90 K (around -180 degrees Celsius).

At this temperature, hydrogen cyanide forms crystals, while methane and ethane exist as liquids.

Using laser spectroscopy to analyze these mixtures at an atomic level, researchers found that while the molecules remained intact, changes were still occurring.

To uncover what was happening, they conducted extensive computer simulations to explore thousands of potential molecular arrangements in the solid phase.

Ultimately, they discovered that the hydrocarbons infiltrated the hydrogen cyanide crystal lattice, leading to the formation of a stable new structure termed a cocrystal.

“The identification of unexpected interactions between these substances may influence our understanding of Titan’s geology and unique features such as lakes, oceans, and sand dunes,” Dr. Rahm explained.

“Moreover, hydrogen cyanide could be crucial in the abiotic synthesis of some life-building blocks, like amino acids for proteins and nucleobases for genetic material.”

“Consequently, our research offers valuable insights into the pre-emergent chemistry of life and the potential for life to evolve in extreme environments.”

of result Published in July 2025. Proceedings of the National Academy of Sciences.

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Fernando Izquierdo Ruiz and others. 2025. Hydrogen cyanide and hydrocarbons mix on Titan. PNAS 122 (30): e2507522122; doi: 10.1073/pnas.2507522122

Source: www.sci.news

I Felt It Was My Destiny: Social Media Rumors Sparked Pregnancy Speculation, Leading to Unforeseen Consequences

I cannot recall the exact moment my TikTok feed presented me with a video of a woman cradling her stillborn baby, but I do remember the wave of emotion that hit me. Initially, it resembled the joyous clips of mothers holding their newborns, all wrapped up and snug in blankets, with mothers weeping—just like many in those postnatal clips. However, the true nature of the video became clear when I glanced at the caption: her baby was born at just 23 weeks. I was at 22 weeks pregnant. A mere coincidence.

My social media algorithms seemed to know about my pregnancy even before my family, friends, or doctor did. Within a day, my feed transformed. On both Instagram and TikTok, videos emerged featuring women documenting their journeys as if they were conducting pregnancy tests. I began to “like,” “save,” and “share” these posts, feeding the algorithm and indicating my interest, and it responded with more content. But it didn’t take long for the initial joy to be overtaken by dread.

The algorithm quickly adapted to my deepest fears related to pregnancy, introducing clips about miscarriage stories. In them, women shared their heartbreaking experiences after being told their babies had no heartbeat. Soon, posts detailing complications and horror stories started flooding my feed.

One night, after watching a woman document her painful birthing experience with a stillbirth, I uninstalled the app amidst tears. But I reinstalled it shortly after; work commitments and social habits dictated I should. I attempted to block unwanted content, but my efforts were mostly futile.

On TikTok alone, over 300,000 videos are tagged with “miscarriage,” and another 260,000 are linked under related terms. A specific video titled “Live footage of me finding out I had a miscarriage” has garnered almost 500,000 views, while fewer than 5 million have been dedicated to women giving birth to stillborns.

Had I encountered such content before pregnancy, I might have viewed the widespread sharing of these experiences as essential. I don’t believe individuals sharing these deeply personal moments are in the wrong; for some, these narratives could offer solace. Yet, amid the endless stream of anxiety-inducing content, I couldn’t shake the discomfort of the algorithm prioritizing such overwhelming themes.


“I ‘like,’ ‘save,’ and ‘share’ the content, feeding it into the system and prompting it to keep returning more”…Wheeler while pregnant. Photo by Kathryn Wheeler

When discussing this experience with others who were also pregnant at the same time, I found shared nods of understanding and similar narratives. They too recounted their personalized concoctions of fears, as their algorithms zeroed in on their unique anxieties. Our experiences felt radical as we were bombarded with such harrowing content, expanding the range of what is deemed normal concern. This is what pregnancy and motherhood are like in 2025.

“Some posts are supportive, but others are extreme and troubling. I don’t want to relive that,” remarks 8-month-pregnant Cerel Mukoko. Mukoko primarily engages with this content on Facebook and Instagram but deleted TikTok after becoming overwhelmed. “My eldest son is 4 years old, and during my pregnancy, I stumbled upon upsetting posts. They hit closer to home, and it seems to be spiraling out of control.” She adds that the disturbing graphics in this content are growing increasingly hard to cope with.

As a 35-year-old woman of color, Mukoko noticed specific portrayals of pregnant Black women in this content. A 2024 analysis of NHS data indicated that Black women faced up to six times the rate of severe complications compared to their white counterparts during childbirth. “This wasn’t my direct experience, but it certainly raises questions about my treatment and makes me feel more vigilant during appointments,” she states.

“They truly instill fear in us,” she observes. “You start to wonder: ‘Could this happen to me? Am I part of that unfortunate statistic?’ Given the complications I’ve experienced during this pregnancy, those intrusive thoughts can be quite consuming.”

For Dr. Alice Ashcroft, a 29-year-old researcher and consultant analyzing the impacts of identity, gender, language, and technology, this phenomenon began when she was expecting. “Seeing my pregnancy announcement was difficult.”

This onslaught didn’t cease once she was pregnant. “By the end of my pregnancy, around 36 weeks, I was facing stressful scans. I began noticing links shared by my midwife. I was fully aware that the cookies I’d created (my digital footprint) influenced this feed, which swayed towards apocalyptic themes and severe issues. Now with a 6-month-old, her experience continues to haunt her.

The ability of these algorithms to hone in on our most intimate fears is both unsettling and cruel. “For years, I’ve been convinced that social media reads my mind,” says 36-year-old Jade Asha, who welcomed her second child in January. “For me, it was primarily about body image. I’d see posts of women who were still gym-ready during their 9th month, which made me feel inadequate.”

Navigating motherhood has brought its own set of anxieties for Asha. “My feed is filled with posts stating that breastfeeding is the only valid option, and the comment sections are overloaded with opinions presented as facts.”

Dr. Christina Inge, a Harvard researcher specializing in tech ethics, isn’t surprised by these experiences. “Social media platforms are designed for engagement, and fear is a powerful motivator,” she observes. “Once the algorithm identifies someone who is pregnant or might be, it begins testing content similar to how it handles any user data.”


“For months after my pregnancy ended, my feed morphed into a new set of fears I could potentially face.” Photo: Christian Sinibaldi/Guardian

“This content is not a glitch; it’s about engagement, and engagement equals revenue,” Inge continues. “Fear-based content keeps users hooked, creating a sense of urgency to continue watching, even when it’s distressing. Despite the growing psychological toll, these platforms profit.”

The negative impact of social media on pregnant women has been a subject of extensive research. A systematic review examining social media use during pregnancy highlights both benefits and challenges. While it offers peer guidance and support, it also concludes that “issues such as misinformation, anxiety, and excessive use persist.” Dr. Nida Aftab, an obstetrician and the review’s author, emphasizes the critical role healthcare professionals should play in guiding women towards healthier digital habits.

Pregnant women may not only be uniquely vulnerable social media consumers, but studies show they often spend significantly more time online. A research article published in midwife last year indicated a marked increase in social media use during pregnancy, particularly peaking around week 20. Moreover, 10.5% of participants reported experiencing symptoms of social media addiction, as defined by the Bergen Social Media Addiction Scale.

In the broader context, Inge proposes several improvements. A redesigned approach could push platforms to feature positive, evidence-based content in sensitive areas like pregnancy and health. Increased transparency regarding what users are viewing (with options to adjust their feeds) could help minimize harm while empowering policymakers to establish stronger safeguards around sensitive subjects.

“It’s imperative users understand that feeds are algorithmic constructs rather than accurate portrayals of reality,” Inge asserts. “Pregnancy and early parent-child interactions should enjoy protective digital spaces, but they are frequently monetized and treated as discrete data points.”

For Ashcroft, resolving this dilemma is complex. “A primary challenge is that technological advancements are outpacing legislative measures,” she notes. “We wander into murky waters regarding responsibility. Ultimately, it may fall to governments to accurately regulate social media information, but that could come off as heavy-handed. While some platforms incorporate fact-checking through AI, these measures aren’t foolproof and may carry inherent biases.” She suggests using the “I’m not interested in this” feature may be beneficial, even if imperfect. “My foremost advice is to reduce social media consumption,” she concludes.

My baby arrived at the start of the year, and I finally had a moment to breathe as she emerged healthy. However, that relief was brief. In the months following my transition into motherhood, my feed shifted yet again, introducing new fears. Each time I logged onto Instagram, the suggested reels displayed titles like: Another baby falls victim to danger, accompanied by the text “This is not safe.” Soon after, there was a clip featuring a toddler with a LEGO in their mouth and a caption reading, “This could happen to your child if you don’t know how to respond.”

Will this content ultimately make me a superior, well-informed parent? Some might argue yes. But at what cost? Recent online safety legislation emphasizes the necessity for social responsibility to protect vulnerable populations in their online journeys. Yet, as long as the ceaseless threat of misfortune, despair, and misinformation assails the screens of new and expecting mothers, social media firms will profit from perpetuating fear while we continue to falter.

Do you have any thoughts on the issues raised in this article? If you would like to submit a response of up to 300 words for consideration in our Letters section, please click here.

Source: www.theguardian.com

Cells Can Be Divided in Unforeseen Ways

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                    <p class="ArticleImageCaption__Title">Inaccuracies in Textbook Descriptions of Human Cell Division</p>
                    <p class="ArticleImageCaption__Credit">Iokanan VFX Studios/Shutterstock</p>
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    <p>Researchers have identified a unique type of cell division that enables cells to store information in a way that determines the identity of their offspring. This discovery is key to advancing tissue engineering techniques and deepening our comprehension of cancer progression.</p>
    <p>Traditionally, it was believed that the majority of cells would curl into a spherical shape prior to division, allowing for an even distribution of contents between the "daughter" cells and ensuring they remain of the same type.</p>
    <p>However, stem cells represent an exception, as they can undergo heterogeneous or asymmetric cell division, yielding two distinct types of cells.</p>
    <p>In a surprising find, <a href="https://research.manchester.ac.uk/en/persons/shane.herbert">Schoen Herbert</a> from The University of Manchester, along with his team, observed that non-stem cells in developing zebrafish blood vessels also divide asymmetrically. These endothelial cells migrated to form new vessel branches and divided without adopting a spherical shape, resulting in different cell types.</p>
    <p>By altering the shape of human endothelial cells in laboratory conditions, the team established that a cell's geometry can predict the symmetry of its division. Longer, more slender cells were more likely to divide asymmetrically, indicating that the division process can be influenced by the cell's shape.</p>
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    <p>Herbert illustrated that cells do not lose their structural and behavioral information during this process, suggesting they maintain their form, thereby preserving their "memory." "Often, they retain their shape, enabling them to convey this memory," he stated.</p>
    <p>This phenomenon allows for a simultaneous movement, division, and production of various cell types without disrupting the ongoing cellular processes. Such flexibility supports rapid adjustments to developmental needs, like supplying tissues necessary for expanding blood vessels and nerves.</p>
    <p>The implications of this discovery extend to lab-grown tissues, where generating functional blood vessels is a significant hurdle. "Our challenge is to create a specific environment that allows these cells to achieve the shapes and behaviors necessary for forming functional blood vessels," explains team member <a href="https://research.manchester.ac.uk/en/persons/holly.lovegrove">Holly Lovegrove</a> from the University of Manchester. Adjusting cell shapes could pave the way for producing specific cell types, she suggests. Conversely, cancer can spread through the formation of clusters of migrating cells, with these new insights potentially shedding light on that process.</p>
    <p>This research exemplifies how organisms can fine-tune mechanisms like cell rounding to accomplish multiple tasks critical for tissue development. <a href="https://www2.mrc-lmb.cam.ac.uk/group-leaders/a-to-g/buzz-baum/">Buzz Baum</a> from the MRC Institute of Molecular Biology in Cambridge, UK, remarked, "This is a clever method to retain essential information while facilitating network growth by generating more cells."</p>
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Source: www.newscientist.com

Dark energy could potentially develop in unforeseen manners as time progresses

New results from the collaboration of Digi (dark energy spectroscopy) reveal signs of time-varying dark energy.

Two “fans” corresponding to the two main areas were observed by Desi on top and bottom of the plane of the Milkyway Galaxy. Image credits: Desi Collaboration/DOE/KPNO/NOIRLAB/NSF/AURA/R. Proctor.

“The universe will never surprise us and will never surprise us,” said Dr Arjun Dei, a digiproject scientist at Noir Love and associate director of the Central Scale Observatory for Strategic Initiatives.

“By unprecedentedly revealing the evolving textures of our universe's fabrics, Digi and Mayall telescopes are changing our understanding of the future of our universe and nature itself.”

The DESI data, which is employed alone, is consistent with the standard model of the universe. In Lambda CDM, CDM is cold dark matter, and Lambda represents the simplest case of dark energy that acts as a cosmological constant.

However, when combined with other measurements, the effect of dark energy may be weaker over time, increasing indications that other models may be more appropriate.

Other measurements of them include light leftovers from the dawn of space (cosmic microwave background, or CMB), distance measurements of supernovae, and observations of how light from distant galaxies are distorted by the effects of dark matter gravity (weak lenses).

So far, the evolving dark energy preference has not risen to 5 sigma. This is the gold standard in physics that represents a commonly accepted threshold of discovery.

However, the various combinations of DESI data and CMB, weak lenses, and supernova sets range from 2.8 to 4.2 sigma.

This analysis used techniques to hide results from scientists to the end to reduce unconscious biases about data.

This approach sets new criteria for how data is analyzed from large-scale spectroscopic studies.

The Desi is a cutting-edge instrument mounted on the NSF Nicholas U. Mayall 4-M telescope of the NSF Noirlab program, Kitt Peak National Observatory.

Light from 5,000 galaxies can be captured simultaneously, allowing you to carry out one of the most extensive research to date.

The experiment is currently investigating the fourth sky in five years, with plans to measure around 50 million galaxies and quasars (very far but bright objects with black holes in their cores) and more than 10 million stars by the time the project is finished.

The new analysis uses data from the first three years of observations and includes nearly 15 million best measured galaxies and quasars.

This is a major leap, with the one used in Desi's initial analysis improving the accuracy of the experiment with more than twice as much data set, suggesting evolving dark energy.

Digi tracks the effects of dark energy by studying how matter spreads throughout the universe.

Very early cosmic events left subtle patterns in the way matter was distributed. This is a function called Barion Acoustic Vibration (BAO).

Its Bao pattern acts as a standard ruler, and its size is directly influenced by how the universe is expanding at different times.

Measuring rulers at different distances has shown the strength of dark energy throughout history by researchers.

DESI Collaboration begins work with additional analysis to extract more information from the current dataset, and Desi continues to collect the data.

Other experiments offered online over the next few years will also provide complementary data sets for future analysis.

“Our results are a fertile foundation for our theory colleagues looking at new and existing models, and we look forward to what they came up with,” says Dr. Michael Levi, Desi Director and Scientist.

“Whatever the nature of dark energy, it shapes the future of our universe. It is very noteworthy that we look up at the sky with a telescope and try to answer one of the biggest questions humanity has ever asked.”

“These are prominent results from very successful projects,” said Dr. Chris Davis, NSF Program Director at NSF Neil Love.

“The powerful combination of NSF Mayall Telescope and DOE's dark energy spectroscopy instruments demonstrates the benefits of federal agencies collaborating with fundamental science to improve our understanding of the universe.”

Physicists shared their findings in a A series of papers It will be posted above arxiv.org.

Source: www.sci.news