Tag

Primates

All articles tagged with #primates

science13 days ago•5 min saved

Ancient Laughs, an Interstellar Visitor, and Weather-Editing Concepts

A roundup of recent science finds: researchers trace laughter back to ape ancestors about 15 million years ago, showing a conserved, recognizable chuckle across great apes; the interstellar comet 3I/ATLAS is identified as the oldest detected object in the solar system, likely formed over 12 billion years ago; a conceptual study proposes “weather jiu-jitsu”—gentle atmospheric nudges to steer extreme weather events—though it remains a proof-of-concept; and an analysis of five decades of top hits reveals a rise in self-focused language in Western lyrics, with East Asian lyrics showing more stability.

via 404 Media|

#interstellar-comet #laughter #primates

science15 days ago•2 min saved

Laughs Across Evolution: Humans and Apes Share Similar Giggle Rhythm

Researchers reanalyzed decades-old recordings of ape laughter and compared them to new footage of children's laughs, finding that humans and great apes share similar rhythmic patterns in their giggles, suggesting laughter evolved from a common ancestor about 15 million years ago. While human laughter can be faster and more context-dependent, its core rhythm remains similar to apes, highlighting laughter as a social bonding tool. The study, published in Communications Biology, underscores the need for more cross-species recordings to illuminate what makes human laughter unique.

via ScienceAlert|

#animal-behavior #evolution #humans

biology16 days ago•19 min saved

Laughter's steady rhythm traces the evolution from apes to human speech

A cross-species study of laughter in orangutans, gorillas, bonobos, chimpanzees, and humans finds laughter isochronous across extant great apes, with tempo accelerating and variability increasing over roughly 15 million years of hominid evolution. Tickling-induced laughter is more regular than play, and humans show the most context-sensitive tempo changes, indicating progressive gains in vocal control that likely paved the way for speech and language.

via Nature|

#biology #hominid-evolution #isochrony

science16 days ago•2 min saved

Ape Chuckles Trace the Rhythm of Laughter Through Evolution

A new study of chimpanzees, gorillas and other great apes (including human children) shows laughter across the group shares a regular rhythmic pattern; nonhuman apes tend to fixed tempos, while humans vary tempo and timing with context, suggesting laughter evolved as a flexible social signal across species.

via The New York Times|

#animal-behavior #evolution #laughter

science1 month ago•13 min saved

Legs Before Hands: Evolution's Leg-Driven Route to Right-Handedness

A new PLOS Biology study analyzing 2,025 primates across 41 species argues that humans’ near-90% right-handedness arises from the combined effects of rapid brain growth and a long leg-to-arm ratio from sustained bipedalism: with legs freed from locomotion, the hands could specialize in manipulation, and the larger brain provided the cognitive substrate, making humans the extreme outlier among primates.

via Space Daily|

#bipedalism #brain-size #handedness

science1 month ago•6 min saved

Two Evolutionary Shifts Forged Humans' Strong Right-Handedness

A Oxford-led study analyzing 2,025 primates suggests humans' extreme right-handedness arose from two key evolutionary milestones—upright walking and brain expansion—that shifted early hominins from mild to strong right-hand bias, with Homo species showing increasing dominance and Homo floresiensis exhibiting weaker bias; the findings support a two-stage process and raise questions about why left-handedness persists and how culture reinforces right-handedness.

via ScienceDaily|

#bipedalism #brain-size #evolution

science1 month ago•7 min saved

Why Humans Sleep Less: An Evolutionary Trade-Off Behind the Sleep Paradox

Anthropologist David R. Samson argues that humans biologically need about 9.5 hours of sleep but typically get under seven, because ancestral shifts from tree to ground sleeping favored short, deep, REM-rich bouts that free time for foraging, social learning and tool use. Drawing on chimpanzee nest-building and fieldwork with the Hadza and BaYaka, the book frames nest-building as a cognitive catalyst in primate evolution, while highlighting sleep’s broad importance to health and cognition and noting some gaps in the comparison to other species.

via Nature|

#anthropology #human-evolution #neuroscience

science2 months ago•8 min saved

Is the Y Chromosome Doomed—or Here to Stay?

ScienceAlert covers a heated debate: Jenny Graves argues the Y chromosome is degrading and could vanish in millions of years, but this forecast is contested and uncertain. Other researchers, notably MIT’s Jenn Hughes, contend core Y genes are deeply conserved in primates and the chromosome is more likely to persist, even as some species have shed or replaced its sex-determining role. The evidence shows sex-determination systems can evolve rapidly, and while the Y’s fate remains unresolved with wide error margins, males would likely persist if alternative mechanisms arise.

via ScienceAlert|

#evolution #genetics #primates

science2 months ago•3 min saved

Gibraltar macaques chew dirt to blunt junk-food digestion

Researchers studying 230 Barbary macaques in Gibraltar found those with more access to tourists’ calorie-dense snacks eat dirt about 12 times a week, suggesting geophagy buffers the digestive impact of high-calorie, low-fiber junk food and may aid gut bacteria; the behavior is more common in seasons with more tourists and is absent in groups with no tourist access.

via BBC Science Focus Magazine|

#geophagy #gut-microbiome #human-wildlife-interaction

science3 months ago•4 min saved

Post-Human Earth: Which Animal Could Claim Dominance?

If humans disappeared, Earth would reorganize with certain species gaining advantages. Birds—especially corvids and parrots—show high problem-solving and could rise to prominence, while adaptable mammals like rats or feral cats and dogs might thrive briefly. Primates and large marine mammals face cognitive or physical constraints, and there is no single species poised to fully replace humans as the dominant force on the planet.

via The Daily Galaxy|

#birds #cognition #ecology

science4 months ago•5 min saved

Tiny Colorado Fossils Reframe Early Primate Migration

Paleontologists in Colorado's Denver Basin uncovered tiny Purgatorius teeth, extending the earliest primates' range south of Montana and suggesting rapid diversification after the K/Pg extinction; the finds, possibly from a new early-diverging Purgatorius, also highlight sampling gaps that may have hidden southern occurrences.

via Indian Defence Review|

#colorado #denver-basin #k-pg-extinction

environment4 months ago•8 min saved

Punch the Baby Monkey Shows the Real Work Behind Viral Animal Welfare

Punch’s viral moment at a Japanese zoo spotlights broader animal-welfare issues, including captivity’s psychological toll on primates and the gap between online empathy and real protections; activists urge reforms and sustained advocacy beyond cute posts.

via vox.com|

#animal-welfare #environment #monkey

science5 months ago•7 min saved

Strength Showdown: The World’s Strongest Primates and What They Reveal About Humans

An illustrated tour of the world’s strongest primates—from gorillas and chimpanzees to gibbons, indris, muriquis and the extinct gigantomyth Gigantopithecus—explains how size, leverage, grip, and locomotion shape their power; humans are not built for raw power but excel at throwing, chimp muscles pack more power per kilogram than ours, and popular belief that a fight with a chimp would be winnable persists (22% of US men according to YouGov).

via BBC Wildlife Magazine|

#chimpanzee #gigantopithecus #gorilla

science5 months ago•17 min saved

Same-sex behavior in primates may boost social survival

New science suggests that same-sex relations among primates may confer evolutionary benefits beyond reproduction by strengthening social bonds, forging alliances, and stabilizing group dynamics, illustrating that natural selection can favor behaviors that don’t fit the traditional survival script.

via The Washington Post|

#biology #evolutionary-biology #monkeys-animals

science5 months ago•2 min saved

40 Hz Sound May Help the Brain Clear Alzheimer's Toxins in Primates

In nine elderly monkeys, daily 40 Hz sound for one week increased cerebrospinal fluid levels of β-amyloid by about 200%, suggesting the brain’s waste-clearance system was more active and the effect lasted five weeks. The results are preliminary, focusing on biomarkers rather than memory outcomes, and human trials are needed to determine real-world therapeutic potential.

via BBC Science Focus Magazine|

#40hz #alzheimers #neuroscience