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Testosterone Key to New Bird Bang Theory

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New research from a Wake Forest University biologist who studies animal behavior suggests that evolution is hard at work when it comes to the acrobatic courtship dances of a tropical bird species.

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Why We Have Chins

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Why are modern humans the only species to have chins? University of Iowa researchers say it's not due to mechanical forces, such as chewing, but may lie in our evolution: As our faces became smaller, it exposed the bony prominence at the lowest part of our heads. Results appear in the Journal of Anatomy.

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More Anti-inflammatory Genes Mean Longer Lifespans for Mammals

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We age in part thanks to “friendly fire” from the immune system — inflammation and chemically active molecules called reactive oxygen species that help fight infection, but also wreak molecular havoc, contributing to frailty, disability and disease. The CD33rSiglec family of proteins are known to help protect our cells from becoming inflammatory collateral damage, prompting researchers at the University of California, San Diego School of Medicine to ask whether CD33rSiglecs might help mammals live longer, too.

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Springing Ahead of Nature: Device Increases Walking Efficiency

It’s taken millions of years for humans to perfect the art of walking. But research results published today in the journal Nature show that humans can get better ‘gas mileage’ using an unpowered exoskeleton to modify the structure of their ankles.

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On the Edge of Extinction: Tiny Pupfish Go without Breathing to Survive their Harsh Environment

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The endangered desert pupfish has made itself at home in the harsh, hot environment of Death Valley hot springs by using a surprising evolutionary adaptation: They can go for up to five hours without oxygen. Research will be presented at the 2015 Experimental Biology Meeting in Boston on Tuesday, March 31.

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Secrets of the Seahorse Tail Revealed

A team of engineers and biologists reports new progress in using computer modeling and 3D shape analysis to understand how the unique grasping tails of seahorses evolved. These prehensile tails combine the seemingly contradictory characteristics of flexibility and rigidity, and knowing how seahorses accomplish this feat could help engineers create devices that are both flexible and strong.

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IU Scientists Discover Mechanism That May Help Parasites Manipulate Their Hosts

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Rodents infected with a common parasite lose their fear of cats, resulting in easy meals for the felines. Now IU School of Medicine researchers have identified a new way the parasite may modify brain cells, possibly helping explain changes in the behavior of mice -- and humans.

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Predatory Snails Evolved Diverse Venoms to Subdue a Wide Range of Prey Species

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A new study by University of Michigan biologists suggests that some predatory marine cone snails evolved a highly diverse set of venoms that enables them to capture and paralyze a broad range of prey species

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Disease, Evolution, Neurology, and Drugs: Fruit Fly Research Continues to Teach Us About Human Biology

Over 1,500 scientists from 30 countries and 46 states will attend next week's 56th Annual Drosophila Research Conference organized by the Genetics Society of America (GSA), March 4–8 in Chicago, IL. The conference will feature close to 1,000 presentations (including 170 talks) describing cutting-edge research on genetics, developmental biology, cancer, stem cells, neurology, epigenetics, genetic disease, aging, immunity, behavior, drug discovery, and technology. It is the largest meeting in the world that brings together researchers who use the fruit fly Drosophila melanogaster to study biology.

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Climate-Change Clues From the Turtles of Tropical Wyoming

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Tropical turtle fossils discovered in Wyoming by University of Florida scientists reveal that when the earth got warmer, prehistoric turtles headed north. But if today’s turtles try the same technique to cope with warming habitats, they might run into trouble.