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E.g., 06/20/2018
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  • Bajau diver spear fishing
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Your search has returned 144 articles:
  • News

    Green blood in lizards probably evolved four times

    Green blood is weird enough. But now the first genealogical tree tracing green blood in New Guinea’s Prasinohaema lizards is suggesting something even odder.

    These skinks have been lumped into one genus just because of blood color, says biologist Christopher Austin of Louisiana State University in Baton Rouge. Yet they don’t all turn out to be close relatives. Green blood looks as if it...

    05/16/2018 - 14:10 Animals, Evolution, Physiology
  • News in Brief

    Larger spleens may help ‘sea nomads’ stay underwater longer

    In turquoise waters off the Indonesian coast, evolutionary geneticist Melissa Ilardo watched as the diver, wearing handmade, wooden goggles, spotted a giant clam meters below and darted down to retrieve it.

    The diver was one of the Bajau people of Southeast Asia, known for holding their breath for long periods while spearing fish and gathering other seafood. During a typical day, these “...

    04/19/2018 - 15:04 Physiology, Genetics
  • News

    A peek into polar bears’ lives reveals revved-up metabolisms

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    Female polar bears prowling springtime sea ice have extreme weight swings, some losing more than 10 percent of their body mass in just over a week. And the beginnings of bear video blogging help explain why.

    An ambitious study of polar bears (Ursus maritimus) in Alaska has found that their overall metabolic rate is 1.6 times greater than thought, says wildlife...

    02/01/2018 - 15:24 Animals, Physiology, Climate
  • News

    Light pollution can prolong the risk of sparrows passing along West Nile virus

    SAN FRANCISCO — Even moderate light pollution can roughly double the time a house sparrow remains a risk for passing along the worrisome West Nile virus.

    House sparrows, about as widespread across the United States as artificial lighting itself, make a useful test species for a first-of-its-kind study of how night illumination might contribute to disease spread, said Meredith Kernbach,...

    01/19/2018 - 09:00 Physiology, Animals, Conservation
  • News

    Blowflies use drool to keep their cool

    SAN FRANCISCO — Blowflies don’t sweat, but they have raised cooling by drooling to a high art.

    In hot times, sturdy, big-eyed Chrysomya megacephala flies repeatedly release — and then retract — a droplet of saliva, Denis Andrade reported January 4 at the annual meeting of the Society for Integrative and Comparative Biology. This process isn’t sweating. Blowfly droplets put the cooling...

    01/05/2018 - 18:04 Animals, Physiology
  • It's Alive

    Robot fish shows how the deepest vertebrate in the sea takes the pressure

    It’s like having “an elephant stand on your thumb.”

    That’s how deep-sea physiologist and ecologist Mackenzie Gerringer describes the pressure squeezing down on the deepest known living fish, some 8 kilometers down. What may help these small, pale Mariana snailfish survive elephantine squashing, says Gerringer of the University of Washington’s Friday Harbor Labs, is a body bulked up,...

    01/03/2018 - 07:00 Animals, Biophysics, Physiology
  • News

    Specialized protein helps these ground squirrels resist the cold

    The hardy souls who manage to push shorts season into December might feel some kinship with the thirteen-lined ground squirrel.

    The critter hibernates all winter, but even when awake, it’s less sensitive to cold than its nonhibernating relatives, a new study finds. That cold tolerance is linked to changes in a specific cold-sensing protein in the sensory nerve cells of the ground...

    12/19/2017 - 12:07 Animals, Genetics, Physiology
  • News

    Narwhals react to certain dangers in a really strange way

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    When escaping from humans, narwhals don’t just freeze or flee. They do both.

    These deep-diving marine mammals have similar physiological responses to those of an animal frozen in fear: Their heart rate, breathing and metabolism slow, mimicking a “deer in the headlights” reaction. But narwhals (Monodon monoceros) take this freeze response to extremes. The animals...

    12/07/2017 - 14:41 Animals, Oceans, Physiology
  • News

    Rough lessons can lessen the pull of human scent on a mosquito

    DENVER – After unpleasant lessons in the lab, mosquitoes can learn some restraint in their zest for pursuing the scent of human skin.

    The test, a kind of aversion therapy for mosquitoes to see if they can associate smells with bad experiences, was reported at the annual Entomological Society of America meeting.

    “Mosquitoes have this very challenging task of finding food that’s...

    11/27/2017 - 10:00 Animals, Physiology
  • News

    Alzheimer’s protein can travel from blood to build up in the brain

    An Alzheimer’s-related protein can move from the blood to the brain and accumulate there, experiments on mice show for the first time.

    The results, published online October 31 in Molecular Psychiatry, suggest that the protein amyloid-beta outside the brain may contribute to the Alzheimer’s disease inside it, says Mathias Jucker, a neurobiologist at the University of Tübingen in Germany....

    11/06/2017 - 06:00 Neuroscience, Physiology