Science 🧬(@science) 인스타그램 상세 프로필 분석: 팔로워 1,846,621, 참여율 1.61%

Meet nature's most weather-sensitive primate—a critically endangered monkey so anatomically unlucky that rainstorms turn into sneeze-filled nightmares.⁠ ⁠ The Myanmar snub-nosed monkey (Rhinopithecus strykeri), discovered just 15 years ago in the remote mountains of northern Myanmar, possesses one of evolution's most peculiar design flaws: upturned nostrils that act like tiny rain funnels. When precipitation falls directly into their exposed nasal cavities, the monkeys sneeze so loudly and frequently that local hunters can easily track them during the wet season by following the distinctive sound echoing through the forest.⁠ ⁠ Local Lisu and Law Waw communities have long known these primates by names meaning "monkey with an upturned face"—mey nwoah and myuk na tok te—and report that the animals have developed a remarkable behavioral adaptation to cope with their unfortunate anatomy. During rainstorms, the monkeys sit with their heads tucked face-down between their knees, maintaining this uncomfortable position until the weather clears to prevent water from entering their problematic nostrils.⁠ ⁠ Scientists formally described Rhinopithecus strykeri in 2011 based on specimens obtained from local hunters, making it the first snub-nosed monkey species discovered in Myanmar. However, the species entered the scientific record already critically endangered, with only 260-330 individuals surviving in a tiny range spanning the Myanmar-China border at altitudes between 8,500-10,000 feet.⁠ ⁠ Habitat destruction from Chinese logging operations and hunting pressure threaten to eliminate this unique species before researchers can fully study their remarkable rain-avoidance behavior. The monkeys spend summer months in higher altitude mixed forests, descending to lower elevations in winter—a seasonal migration that makes them particularly vulnerable to human encroachment and habitat fragmentation.

Scientists have finally solved the mystery of why cute animal content dominates the internet—and it's not just about getting likes. A study from Concordia University and ESSEC Business School reveals that sharing videos of cute animals actually strengthens human relationships in ways we never understood before.⁠ ⁠ Researchers Zeynep Arsel and Ghalia Shamayleh discovered that sending animal content creates "digital affective encounters"—moments that trigger genuine positive emotions between people. ⁠ ⁠ The study, published in the Journal of Consumer Research, interviewed animal content creators and consumers to understand this phenomenon. What they found was shocking: people put serious thought into which animal posts they share, using them to recall shared memories and show deep personal knowledge of their friends.⁠ ⁠ The research reveals that animal content acts as a "social lubricant" online, creating what scientists call "digital affective networks"—entire relationship systems built around mood-boosting content. Someone might send a video of baby pandas falling over with the caption "You and me at our first yoga class," instantly connecting past experiences with present laughter.⁠ ⁠ This isn't mindless scrolling—it's sophisticated emotional communication. In a world where social media gets criticized for toxic content, cute animals have become our secret weapon for maintaining genuine human connections across digital spaces.⁠ ⁠ The findings suggest that your daily dose of cat GIFs isn't digital junk food—it's relationship maintenance disguised as entertainment.⁠ ⁠ Source: 10.1093/jcr/ucaf023

Myopia is rapidly becoming one of the defining public health trends of this century. If current projections hold, about half the world could be nearsighted by 2050, and in parts of East and Southeast Asia, close to 90 percent of young adults already are.⁠ ⁠ Myopia happens when the eyeball grows too long, so distant images focus in front of the retina instead of on it. Genetics matter, but the speed of the rise over just a few decades points hard at environment: more near work, less outdoor time, and increasingly indoor lives.⁠ ⁠ A large systematic review in the *British Journal of Ophthalmology* tracked childhood and teen myopia across decades and countries, showing prevalence climbing from about 24 percent in 1990 to nearly 36 percent by 2023, with projections approaching 40 percent by mid-century. Adolescents are hit hardest, and urban living and academic pressure stack the odds.⁠ ⁠ A newer physiological twist comes from SUNY optometry researchers in *Cell Reports*: it may not be screens alone, but screens plus dim lighting. In a study of 34 volunteers, sustained close focus in low light drove strong pupil constriction and “light starvation” at the retina, especially in myopic eyes. Dark targets intensified the effect, and myopic participants showed altered blink-linked pupil behavior that could keep the eye stuck in over-constriction.⁠ ⁠ Prevention and treatment are behavioral as well as medical. Bright outdoor light and distance viewing appear protective, while atropine drops or specialized lenses may work less well if near work continues in poorly lit rooms. Taken together, the research points to lighting and viewing habits as practical levers to slow the trend.⁠ ⁠ Source: 10.14744/bej.2021.27146

In "Why Walking through a Doorway Makes You Forget," Charles B. Brenner and Jeffrey M. Zacks examine a cognitive glitch known as the "doorway effect." Highlighting research from the University of Notre Dame, the authors explain why we often forget our intentions upon entering a new room. In experiments, subjects carried objects across a single room or through a doorway into another. Those who crossed a threshold had far worse memory retention than those who walked the same distance without leaving the room. Occurring in both physical and virtual settings, this reveals that doorways act as mental boundaries.⁠ ⁠ This amnesia occurs because brains organize short-term tasks using "event models" tied to physical spaces. Working memory keeps information accessible only while it remains contextually relevant. When you cross a threshold, the brain perceives this location shift as the end of an episode. To prepare for the new space, it purges the previous event model to free up cognitive resources, assuming prior goals are no longer needed. This mental decluttering helps us adapt to new surroundings, but it inadvertently erases what we intended to do, proving memory is deeply anchored to spatial contexts.⁠ ⁠ _____⁠ ⁠ ⁠ #evolutionary #science #dna #biology #neuroscience

We’ve all experienced — and inflicted — the condition known as 'death by PowerPoint'.⁠ But there is a cure: Mix neuroscience with design, education theory, and practice.⁠ Dr. Jared Horvath’s academic passion is to translate neuroscience knowledge to enhance classroom teaching and learning. He has taught in US schools and is a researcher at Melbourne Graduate School of Education.⁠ He’s now researching the impact of digital technology on learning, looking at effective combinations of text, audio, and visuals.⁠ “Unfortunately, we don’t truly learn things by just pouring data in any fashion into our heads, Dr. Horvath says.⁠ “Education research suggests learning only occurs if there is interaction, integration, and reinforcement via different sensory channels.”⁠ ⁠ “We intuitively know we need to see it, hear it, feel it, do it, think it, and share it to learn it.”⁠ Dr. Horvath has combed through education, neuroscience, and design literature to compile strategies to help people improve their PowerPoint presentations.⁠ ⁠ _____⁠ ⁠ Neuroscience shows people can’t actually read and listen at the same time.⁠ Listening and reading activate similar areas of the brain, and the voices compete.⁠ “A pivotal study using functional MRI brain scans showed the activation of the linguistic areas of the brain for both listening and reading, Dr. Horvath says.⁠ “When you read, you’re actually listening to your inner reading voice. So when you’re listening to the speaker and trying to read a lengthy text, it’s often not in sync. It’s like two people talking at the same time.”⁠ Even though you may think you can read and listen at the same time, what’s actually happening is that you are quickly flipping between the two.⁠ The two narrative voices are competing; it’s disjointed white noise, and it’s soporific.⁠ “It’s called the redundancy principle, and it’s unnecessarily mentally taxing,” Dr. Horvath says.⁠ ⁠ ⁠ ⁠ #science #neuroscience #brain #biology #evolution

The Y chromosome is shrinking in aging men. As men grow older, many of their cells covertly lose the Y chromosome, creating a biological patchwork of cells with and without it. Once dismissed as harmless, this loss is now being tied to heart disease, cancer, neurodegeneration, and shorter lifespans.⁠ ⁠ Large population studies show the pattern is common. About 40% of men at age 60 have detectable Y loss in some blood cells, rising to nearly 57% by age 90. Smoking and exposure to carcinogens increase the risk. Cells that lose the Y do not regain it, and their descendants also lack it, producing a mosaic of altered tissue.⁠ ⁠ For decades, scientists assumed the Y chromosome mattered little outside reproduction because it carries only about 50 to 70 protein-coding genes, far fewer than the X chromosome. It can even be lost in cultured cells without killing them. Though this was before evolution has been steadily trimming the Y for 150 million years, and some rodents have replaced it entirely.⁠ ⁠ Yet evidence now links Y loss to kidney disease, heart attacks, Alzheimer’s disease, and certain cancers, and increased mortality. A major mouse study published in *Science* used CRISPR-edited bone marrow to remove the Y from blood cells. The animals developed more heart fibrosis, weaker cardiac contractions, and died earlier. Human data from the UK Biobank show men missing the Y in at least 40% of white blood cells face significantly higher risk of fatal cardiovascular disease.⁠ ⁠ The Y chromosome may be small, but it carries genes that regulate immune function, suppress tumors, and influence gene activity across the genome. Its absence appears to ripple far beyond sex determination, reshaping how aging unfolds in male bodies at large.⁠ ⁠ Source: 10.1002/rmb2.12445⁠

When your teenagers don’t seem to hear you, it’s not simply that they don’t want to clean their room or finish their homework: Their brains aren’t registering your voice the way they did in pre-teenage years.⁠ ⁠ Around age 13, kids’ brains no longer find their moms’ voices uniquely rewarding, and they tune into unfamiliar voices more, a new study from the Stanford School of Medicine has found.⁠ ⁠ _____⁠ ⁠ The research, published in April this year in the Journal of Neuroscience, used functional MRI scans to provide the first detailed neurobiological explanation for how teens begin to separate from their parents.⁠ ⁠ “Just as an infant knows to tune into her mother’s voice, an adolescent knows to tune into novel voices,” said lead study author Daniel Abrams, Ph.D., clinical associate professor of psychiatry and behavioral sciences. “As a teen, you don’t know you’re doing this. You’re just being you: You’ve got your friends and new companions, and you want to spend time with them. Your mind is increasingly sensitive to and attracted to these unfamiliar voices.”⁠ ⁠ ⁠ ⁠ ⁠ #teen #teenager #child #brainfacts #sciencefacts #facts

Researchers found that sitting for extended periods – for example, long stints in front of the TV or working at a desk – is associated with dying earlier. However, participating in moderate-to-vigorous physical activity (MVPA) can eliminate the risk.⁠ ⁠ At the more moderate end of the scale, this could be anything from heavy cleaning around the home, playing badminton, or cycling at 10-12mph, while more vigorous activities could include jogging at 6mph or faster, playing football, basketball, or tennis.⁠ ⁠ _____⁠ ⁠ Author Edvard Sagelv, from the Arctic University of Norway, told the PA news agency: "In our study, we found that only those people doing more than 12 hours per day sitting had a higher risk of death. Every minute, higher MVPA showed a lower risk of death – meaning if people were doing less than 22 minutes (such as 10 minutes), there was still a lower risk of death.⁠ ⁠ "However, doing 22 minutes eliminated the higher risk of death from sedentary time. This means that if doing 22 minutes or more per day, there was no excess risk from sedentary time. And, if doing more than 22 minutes per day, there was a lower risk of death overall. Basically, the more, the better."⁠ ⁠ ⁠ ⁠ ⁠ ⁠ ⁠ #walking #briskwalk #jogging #jog #science #biology

🗣️ Over the past decade, psychologists have become increasingly interested in using such mental metamorphoses. Besides altering the quality of our memories, switching between languages can influence people’s financial decision-making and their appraisal of moral dilemmas. ⁠ ⁠ By speaking a second language, we can become more rational, open-minded, and better equipped to deal with uncertainty. This phenomenon is known as the “foreign language effect.” The benefits may inspire anyone who would like to enrich their mind with the words of another tongue.⁠ ⁠ ⁠ ⁠ ⁠ ⁠ #multilingual #polyglot #multilingualism⁠ #bilingual #languages #psychology #science

According to a 2020 study by the American Academy of Neurological and Orthopaedic Surgeons, the smell of donuts and licorice combined can increase blood flow to the male genitalia by 32%. Mixing the odors of donuts and pumpkin pie was also said to cause an increase of about 20%. But the ultimate way to supercharge an erection is the combination of lavender and pumpkin pie, increasing b*ner power by 40%!⁠ ⁠ ⁠ ⁠ ⁠ ⁠ ⁠ #donuts #cooking #donut #bloodflow #science #biology #brain

For years, a genetic legend claimed Genghis Khan’s conquests claimed about 1 in 200 men today supposedly carried his Y chromosome, passed down father-to-son slowly over the generations.⁠ ⁠ Ancient DNA is now roughing up that story. Researchers sequenced genomes from four elite burials linked to the Golden Horde in Kazakhstan’s Ulitau region, a Mongol-ruled state founded by descendants of Genghis Khan’s eldest son, Jochi.⁠ ⁠ Genetically, the three men were closely related on the paternal line and did fall within the famous C3* Y-chromosome family, the same broader cluster spotlighted in a 2003 study that helped fuel the “Genghis lineage” claim. The catch is in the fine print. These Golden Horde elites carried a rare sub-branch of C3*, not the dominant version found widely across Eurasia today.⁠ ⁠ That split matters. If the ruling line tied to Jochi carries a rarer branch, the massively common branch may trace back to a different patriarch, potentially long before the Mongol Empire existed. Without confirmed DNA from Genghis Khan himself, the true match remains unprovable, but the boundaries of the myth have now tightened. The results were published in the Proceedings of the National Academy of Sciences.⁠ ⁠ So, how far does Genghis Khan lineage echo in history?⁠ ⁠ Source: 10.1073/pnas.2531003123⁠

The experiment, run by King’s College London strategy professor Kenneth Payne and posted on arXiv, matched GPT-5.2, Claude Sonnet 4, and Gemini 3 Flash against one another across escalating geopolitical scenarios, from territorial clashes to regime-threatening standoffs. The models were given an “escalation ladder” of options, spanning diplomacy, conventional force, nuclear threats, and nuclear strikes.⁠ ⁠ The grim result was about tactical weapons: in 95% of games, at least one tactical nuclear strike was used. The models often described tactical nukes as a legitimate coercive tool, more like an extension of escalation than a boundary that should never be crossed.⁠ ⁠ Strategic nuclear use was far less common, and the study argues the systems appeared to treat strategic strikes as a catastrophic “firebreak,” while imagining tactical strikes as controllable. In other words, the models acted like they’d learned a difference in scale, but not a difference in kind.⁠ ⁠ Across 21 games and 329 turns, the AIs also showed a stubborn refusal to truly back down. Payne reports that options like full surrender or complete accommodation went unused, even when a model was losing, with escalation acting like a one-way road.⁠ ⁠ Payne suggests possible causes: models don’t feel fear or horror, their training data includes Cold War strategic writing that can normalize “limited” nuclear use. In addition, humanity’s “nuclear taboo” may look more solid than it is because we only observe crises that ended without nuclear fire.⁠ ⁠ Source: 10.48550/arXiv.2602.14740⁠