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Desert Shark Discoveries in Egypt Highlight a Lost Inland Sea
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Cowpea’s soil signals recruit wasps to defend against leafminers
New research shows cowpea plants defend against leafminers by releasing airborne volatiles that attract parasitic wasps, and by exuding root compounds that reshape the surrounding soil microbiome. This soil-borne defense boosts the plant’s ability to recruit wasps even when not attacked, creating a multi-step indirect defense—potentially guiding sustainable pest management, though real-world duration of the effect remains uncertain.
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Cat Kidney Lipids Create Durable Urine Signatures
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Ancient Asgard Ancestor Traces All Complex Life
ZME Science•10 days ago
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Ancient Cynodont Fossil Pushes Live Birth Deep into Mammal Lineage
Analysis of a 236-million-year-old cynodont fossil from Argentina reveals a neonatal bone line indicating live birth, with a newborn mass around 1.68 kg (about 10–20% of an adult), suggesting viviparity originated in the mammalian lineage far earlier than thought (roughly 90–95 million years ago) and proposing two plausible evolutionary scenarios for this trait's emergence.
Three Dodo Skulls Reframe the Extinction Narrative
With only three preserved dodo skulls, researchers CT-scanned them and compared brain structures to pigeons, finding the dodo’s forebrain size isn’t disproportionately small for its body, challenging the view of the dodo as unintelligent; the study also hints at nocturnal traits via optic lobes, but stresses these remain speculative since no dodo brains exist to study directly.
Poop Might Have Sparked the Cambrian Explosion
Researchers propose that a gradual, ocean-wide buildup of fecal matter redistributed nutrients, spurring the evolution of complex digestive systems and creating a feedback loop where more life produced more poop, contributing to the Cambrian Explosion.
Deep Beneath the Great Lakes, a Hidden World of Fungi and Tardigrades Emerges
Researchers drilling into the Antrim Shale beneath the Great Lakes found a vibrant underground ecosystem: 689 fungal species (including 13 new ones) alongside tardigrades and worms, forming a subterranean food web fed by ancient organic matter. Isotopic dating links the water to the Ice Age, last in contact with surface about 11,000 years ago, suggesting deep subsurface biodiversity may be underestimated and could influence carbon cycling.
Life with Intent: Rethinking Biological Agency
Quanta Magazine surveys whether ‘biological agency’—the idea that life acts with goals or reasons—is scientifically productive, weighing mechanistic, gene-centered explanations against views that organisms set proximal goals through context, learning, and interaction with their environment. The piece traces debates from Mayr and Monod to Baldwin’s effect and Lamarck, examines whether agency implies conscious deliberation, and argues for developing a formal, testable theory of agency that could unify biology with development, evolution, and future artificial agents.
Ultra-Rare 450-Million-Year-Old Crinoid Fossil Preserves Soft Tissues
Scientists have identified the second-ever crinoid fossil with preserved soft tissues, dating to about 450 million years ago; found in a Montreal museum, the specimen offers rare insights into ancient crinoid biology and behavior and was detailed in Royal Society Open Science.
Superworms Prove a Greener, Faster Way to Clean Skeletons for Museums
Researchers in Iran and Germany tested using the larvae of Zophobas morio—the superworm—to clean animal skeletons for museum displays, finding they can efficiently remove flesh in a safe, affordable, and environmentally friendlier way than chemicals or dermestid beetles. The study in PLOS One identified an optimal worm-to-carcass ratio (about 10–15 grams of worms per 1 gram of carcass) and reported minimal damage to delicate bones while reducing pest risks.
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.
Purine-rich coding sequences guard bacterial genes from Rho termination during runaway transcription
Using a genome-wide Rho-termination screen in Bacillus subtilis, the study shows that coding strands are purine-rich to shield runaway transcription from Rho-dependent termination, while antisense regions are pyrimidine-rich, making them targets for Rho. In rho-containing Bacilli this purine bias shapes codon usage and constrains foreign gene expression; rho-less species relax the bias and can tolerate more pyrimidines. Recoding a gene to be more purine-rich suppresses Rho termination, and foreign sequences such as HGH lose expression in B. subtilis unless recoded. The findings reveal a sequence-based constraint on genome evolution beyond replication biases.
A single gene speeds growth but shortens lifespan in aging killifish
A Nature Communications study shows the vgll3 gene influences how fast African turquoise killifish grow and reach reproductive age, with CRISPR edits accelerating growth and puberty but increasing late-life tumors and shortening lifespan, providing rare in-vertebrate evidence for antagonistic pleiotropy and suggesting a trade-off between early-life benefits and later-life disease; the findings hint that similar mechanisms could partly explain aging in humans and motivate research to separate growth benefits from cancer risks.