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TheBias Brief

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‘Loud signal’: Men with this head shape seen as more capable parents, better fighters: Study

A study in Evolutionary Psychological Science found that men with wider faces are perceived as more capable parents and better fighters. The article describes the experiments, expert comments, and limitations, including that perceptions may reflect evolutionary snap judgments.

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Ancient teeth pose a mystery: What made those strange grooves?

New research suggests ancient hunter-gatherers in Indonesia sucked betel nuts for pain relief, leaving distinctive grooves in their teeth. Experiments with artificial saliva and frog egg cells indicate the practice could release arecoline and affect human brain receptors. The study adds to evidence of long-standing drug use among humans.

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A melanoma vaccine was hailed as a breakthrough. Which cancers are next?

An experimental mRNA melanoma vaccine succeeded in a Phase 3 trial, and researchers are now testing similar personalized vaccines for lung, pancreatic, breast, and brain cancers. The article explains how mRNA cancer vaccines work, highlights early promising results, and notes that many treatments remain years away from proving safe and effective.

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Meet Earth's newest wild cat species, living in Bolivia and the first named in over a century

Scientists have identified a previously unknown wild cat species in Bolivia, named Leopardus tilcayo, marking the first formal description of a new living wild cat species in over a century. The small spotted feline was found at a wildlife sanctuary, and genomic analysis indicates its lineage split from relatives about 1.4 million years ago. Researchers hope the designation will help protect its cloud forest habitat.

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