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E.g., 12/11/2017
E.g., 12/11/2017
Your search has returned 120 images:
  • narwhals
  • Aedes aegypti mosquito
  • amyloid-beta buildup in mouse brain
Your search has returned 137 articles:
  • News

    Narwhals react to certain dangers in a really strange way

    View the video

    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
  • Say What?

    This sea slug makes its prey do half the food catching

    Kleptopredation\klep-toe-preh-day-shun \ n.

    A food-gathering strategy of eating an organism and the meal it just ate.

    A wily sea slug has a way to get two meals in one: It gobbles up smaller predators that have recently gulped in their own prey.

    “Kleptopredation” is the term Trevor Willis of the University of Portsmouth in England and his colleagues propose for this kind of food...

    10/31/2017 - 20:05 Animals, Physiology
  • Feature

    Scary as they are, few vampires have a backbone

    Halloween horror aside, vampires are really pretty spineless.

    Most have no backbone at all. By one count, some 14,000 kinds of arthropods, including ticks and mosquitoes, are blood feeders. Yet very few vertebrates are clear-cut, all-blood specialists: just some fishes and three bats. Why hasn’t evolution produced more vertebrate vampires?

    The question intrigues herpetologist Harry...

    10/30/2017 - 16:00 Animals, Physiology, Evolution
  • Feature

    Being a vampire can be brutal. Here’s how bloodsuckers get by.

    Jennifer Zaspel can’t explain why she stuck her thumb in the vial with the moth. Just an after-dark, out-in-the-woods zing of curiosity.

    She was catching moths on a July night in the Russian Far East and had just eased a Calyptra, with brownish forewings like a dried leaf, into a plastic collecting vial. Of the 17 or so largely tropical Calyptra species, eight were known vampires. Males...

    10/18/2017 - 12:00 Animals, Physiology
  • News

    Cracking the body clock code wins trio a Nobel Prize

    Discoveries about the molecular ups and downs of fruit flies’ daily lives have won Jeffrey C. Hall, Michael Rosbash and Michael W. Young the Nobel Prize in physiology or medicine.

    These three Americans were honored October 2 by the Nobel Assembly at the Karolinska Institute in Stockholm for their work in discovering important gears in the circadian clocks of animals. The trio will...

    10/02/2017 - 17:22 Physiology, Genetics, Cells
  • Science Ticker

    Body clock mechanics wins U.S. trio the Nobel Prize in physiology or medicine

    Discoveries about the clocklike ups and downs of daily life have won Jeffery C. Hall, Michael Rosbash and Michael W. Young the Nobel Prize in physiology or medicine.

    Circadian rhythms are daily cycles of hormones, gene activity and other biological processes that govern sleep, body temperature and metabolism. When thrown out of whack, there can be serious health consequences, including...

    10/02/2017 - 06:41 Physiology, Biomedicine
  • News

    Woolly rhinos may have grown strange extra ribs before going extinct

    As time ran out for the woolly rhino, strange things happened. Before going extinct, some of the beasts faced an unusually high risk of growing bizarre ribs in their neck, a new study suggests. Those misplaced ribs might have signaled the animals’ impending demise.

    Scientists examined neck bones from 32 woolly rhinos and found indented spots on five of them where ribs had once attached...

    09/07/2017 - 11:00 Paleontology, Evolution, Physiology
  • News

    Bones reveal what it was like to grow up dodo

    Dumb extinction jokes aside, dodos’ life history is largely unknown.

    Now the first closeup look inside the long-gone birds’ bones is giving a glimpse into their lives, an international research team reports August 24 in Scientific Reports. Until now, almost nothing has been known about the basic biology of dodos, such as when they mated or how quickly they grew.

    Based on 22 bones...

    08/29/2017 - 07:00 Animals, Physiology, Evolution