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Body size, not competition, may kickstart evolution

A new theory proposes that changes in body size rather than competition for resources may kickstart the earliest physical differences between species. The theory, developed by UC Riverside evolutionary biologist Bryan Jennings, suggests that an initial divergence in body size can lead to a broader process of disassociational scaling, w...

SourceUniversity of California - Riverside·JournalEvolutionary Journal of the Linnean Society·TypeObservational study·DateNov 3, 2026

Mycorrhizal type and life form independently shape resource‑use strategies of Qinling woody plants

This study investigated the effects of mycorrhizal type and life form on resource-use strategies in woody plants of the Qinling Mountains. The results showed that arbuscular mycorrhizal (AM) species exhibited acquisitive trait signatures, while ectomycorrhizal (ECM) species followed conservative strategies. Life forms also modulated le...

SourceSouth China Botanical Garden, Chinese Academy of Sciences·JournalBiological Diversity·TypeExperimental study·DateOct 23, 2026

Beetles build with a yellow pigment gene

Tortoise beetles use a yellow pigment gene to create protective spheres for symbiotic bacteria, which are essential for their survival. The spheres are made from a dense, glue-like matrix formed from the yellow protein, and are essential for the bacterium's digestion and survival.

SourceJohn Innes Centre·JournalNature Communications·TypeExperimental study·DateOct 7, 2026

Updated checklist reveals rich, threatened terrestrial mammal diversity on Hainan Island

Researchers have compiled a comprehensive updated checklist of terrestrial mammals on Hainan Island, China's largest tropical island. The study documents 95 species, including 12.91% of China's terrestrial mammalian species richness, and identifies 10 species as threatened under IUCN criteria.

SourceSouth China Botanical Garden, Chinese Academy of Sciences·JournalBiological Diversity·TypeData/statistical analysis·DateSep 4, 2026

Last common ancestor, no matter its feet, could have been a vertical climber

A study from Ohio State University found that sooty mangabey monkeys, with feet similar to those of humans, can climb vertical tree trunks with ease. The research suggests that the last common ancestor of humans and chimpanzees could have been a vertical climber, challenging existing theories about foot structure and forest environment...

SourceOhio State University·JournalProceedings of the National Academy of Sciences·DateAug 17, 2026

Study offers new clues to a long-standing mystery about bonnethead sharks

A new study by the University of Miami Rosenstiel School reveals that male and female bonnetheads have distinct head shapes that develop differently as they mature. Contrary to previous research, the sharks' heads become rounder in females, not more pointed when reaching sexual maturity.

SourceUniversity of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science·JournalIntegrative Organismal Biology·TypeObservational study·DateAug 3, 2026

JMIR Biomedical Engineering invites submissions on “Sex and Gender in Biomedical Engineering: Toward Equitable Outcomes in Workforce and Modeling.”

This section explores how recognizing sex as a biological variable and gender as a sociocultural construct can lead to more precise computational models and safer medical technologies. The aim is to foster an equitable and effective biomedical engineering field where technologies meet the needs of all populations.

Sharper, straighter, stiffer, stronger: Male green hermit hummingbirds have bills evolved for fighting

Researchers found that male green hermit hummingbirds' bills are straighter (3%) and sharper (69%) than females', allowing for more efficient energy expenditure and stress resistance during fights. These differences were driven by the birds' tendency to fight for mates, rather than solely by ecological factors.

SourceUniversity of Washington·JournalJournal of Experimental Biology·DateNov 21, 2025

A ubiquitous architectural pattern in nature

Researchers have identified and classified 100 biological tilings across various taxonomic groups, providing insights into their functions and dominance. These findings could lead to novel manufacturing design challenges and bio-inspired innovations.

SourcePNAS Nexus·JournalPNAS Nexus·DateNov 11, 2025

Ditch ‘shrink it and pink it’ approach to women’s running shoes, manufacturers urged

A study finds that women runners prioritize comfort, injury prevention, and performance when choosing running shoes, highlighting a need for sex- and gender-specific designs that accommodate female foot morphology across the lifespan. The researchers recommend moving beyond scaling down men's shoes to fit women's feet.

SourceBMJ Group·JournalBMJ Open Sport & Exercise Medicine·TypeObservational study·DateOct 14, 2025

Study first to show if nesting heat affects sea turtle hatchling ‘IQ’

A new study by Florida Atlantic University researchers found that heat does not significantly affect the cognitive ability of sea turtle hatchlings. However, higher incubation temperatures negatively impact their physical traits, including shorter incubation durations, lower hatching success, and more frequent scute anomalies. The stud...

SourceFlorida Atlantic University·JournalEndangered Species Research·TypeObservational study·DateSep 30, 2025

Longer body size means more female calves for baleen whale moms

Researchers tested a popular evolutionary theory by comparing maternal length and fetal sex in over 100,000 whales. They found that the fetal sex ratio skews female for longer body size, suggesting that female calves benefit more from heritable fitness than males do. The findings contradict the Trivers-Willard hypothesis.

SourceUniversity of Washington·JournalProceedings of the Royal Society B Biological Sciences·TypeData/statistical analysis·DateSep 23, 2025

Safely navigating treetops thanks to a scaly tail

Researchers from Empa's Soft Kinetic group studied the rare scaly-tailed squirrels' unique bodily structure, discovering that their thorn-covered scales help them maintain position and grip onto tree bark. The study aims to inform robotics by adopting morphological structures and behaviors honed through millions of years of evolution.

SourceSwiss Federal Laboratories for Materials Science and Technology (Empa)·JournalJournal of The Royal Society Interface·TypeExperimental study·DateJul 2, 2025

New 3D modeling method quantifies light-shading impact of freshwater microalgae

A novel 3D modeling method accurately quantifies the shading potential of over 800 microalgal species, affecting underwater light conditions and ecosystem balance. The study provides a comprehensive Projected Area Database for freshwater microalgae, enabling researchers to estimate the ecological impact of algal blooms.

SourceHun-Ren Ökológiai Kutatóközpont·JournalWater Research·TypeComputational simulation/modeling·DateJun 24, 2025

Long working hours may alter brain structure, preliminary findings suggest

Preliminary research suggests that long working hours can induce neuroadaptive changes in the brain, particularly in areas associated with emotional regulation and executive function. The study found increased brain volumes in regions such as the middle frontal gyrus, which is involved in attention and problem-solving.

SourceBMJ Group·JournalOccupational and Environmental Medicine·TypeExperimental study·DateMay 13, 2025

New study reveals Neanderthals experienced population crash 110,000 years ago

A new study found that Neanderthals experienced a drastic loss of genetic variation approximately 110,000 years ago, leading to their eventual extinction. The research measured the morphological diversity in semicircular canals, which revealed lower diversity in classic Neanderthals compared to pre-Neanderthals and early Neanderthals.

SourceBinghamton University·JournalNature Communications·TypeComputational simulation/modeling·DateFeb 25, 2025

Are dogs really bred for function? New Chapman study challenges the assumptions about certain breeds

A new study by Nicholas Hebdon and Lindsay Waldrop found substantial overlap in skull shapes across dog breeds and functional categories, challenging the prevailing belief that certain breeds are inherently superior at specific tasks. The researchers discovered no clear evidence of morphological specialization for bite work or scent work.

SourceChapman University·JournalScience Advances·TypeMeta-analysis·DateJan 30, 2025