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E.g., 12/10/2017
E.g., 12/10/2017
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Your search has returned 414 articles:
  • Introducing

    This new dinosaur species was one odd duck

    It may have walked like a duck and swum like a penguin, but a flipper-limbed creature discovered in what is now Mongolia was no bird. The strange new species is the first known nonavian dinosaur that could both run and swim, researchers say.

    To compensate for a long swanlike neck, probably used for dipping underwater for fish, this dino’s center of mass shifted toward its hips, allowing...

    12/06/2017 - 13:29 Paleontology, Animals, Evolution
  • It's Alive

    Studying giant tortoise flips without tipping the animals over is a delicate business

    It would be a memorable sight. But it would also be so wrong to tip over Galápagos giant tortoises to see how shell shape affects their efforts to leg-pump, neck-stretch and rock right-side up again.

    Shell shape matters, says evolutionary biologist Ylenia Chiari, though not the way she expected. It’s taken years, plus special insights from a coauthor who more typically studies scorpions...

    11/30/2017 - 09:00 Animals, Biophysics, Evolution
  • Letters to the Editor

    Readers debate ethics of resurrecting extinct species

    Culture club

    The book Rise of the Necrofauna tackles the challenges of using gene-editing tools to bring woolly mammoths and other long-gone species back from the dead. These “de-extincted” creatures would have to contend with a radically changed world that includes new habitats and diseases, Tina Hesman Saey wrote in her review “Resurrecting extinct species raises ethical questions” (SN: 10/28...

    11/29/2017 - 15:36 Evolution, Science & Society
  • News

    These spiders may have the world’s fastest body clocks

    WASHINGTON, D.C. — If it takes you a while to recover from a few lost hours of sleep, be grateful you aren’t an orb weaver. 

    Three orb-weaving spiders — Allocyclosa bifurca, Cyclosa turbinata and Gasteracantha cancriformis — may have the shortest natural circadian rhythms discovered in an animal thus far, researchers reported November 12 at the Society for Neuroscience’s annual meeting...

    11/14/2017 - 16:00 Animals, Evolution, Development
  • Introducing

    The Lord Howe stick insect is officially back from the dead

    It’s a rare triumph when a species comes back from the dead. A new genetic analysis has officially established what many entomologists and conservation biologists hoped was true: The Lord Howe stick insect (Dryococelus australis) lives.

    Nicknamed “tree lobsters,” the dark-brown crawlers are nocturnal, flightless creatures that can grow up to 15 centimeters long. They feed on tea trees,...

    11/13/2017 - 12:30 Animals, Conservation, Evolution
  • News

    This deep-sea fish uses weird eyes to see in dark and light

    Light-sensitive cells in the eyes of some fish do double-duty. In pearlsides, cells that look like rods — the stars of low-light vision — actually act more like cones, which only respond to brighter light, researchers report November 8 in Science Advances. It’s probably an adaptation to give the deep-sea fish acute vision at dawn and dusk, when they come to the surface of the water to feed....

    11/09/2017 - 15:25 Animals, Evolution
  • News

    Crested pigeons sound the alarm with their wings

    Crested pigeons communicate without even opening their beaks. The birds have a built-in alarm system that’s set off by fluttering feathers when flying away from danger, researchers report November 9 in Current Biology.

    In animals, nonvocal sounds are not uncommon. “All animals produce sound as we move, even humans, and that sound can be useful to those that hear it,” says study coauthor...

    11/09/2017 - 13:28 Animals, Biophysics, Evolution
  • It's Alive

    Here’s why some water striders have fans on their legs

    For an animal already amazing enough to walk on water, what could growing feather fans on its legs possibly add?

    These fans have preoccupied Abderrahman Khila of the University of Lyon in France, who keeps some 30 species of bugs called water striders walking the tanks in his lab without getting their long, elegant legs wet.

    “Walk” may be too humdrum a word. The 2,200 or so known...

    11/03/2017 - 14:30 Animals, Evolution, Genetics
  • Science Ticker

    What male bias in the mammoth fossil record says about the animal’s social groups

    Male mammoths really had to watch their steps. More than two-thirds of woolly mammoth specimens recovered from several types of natural traps in Siberia came from males, researchers report November 2 in Current Biology.

    Paleogenomicist Patrícia Pečnerová of the Swedish Museum of Natural History in Stockholm and her colleagues examined genomic data recovered from 98 mammoth bone, tooth,...

    11/02/2017 - 12:15 Paleontology, Evolution, Ecology
  • News

    No more than 800 orangutans from this newly identified species remain

    Orangutans living in forested foothills on the Indonesian island of Sumatra represent a previously unknown species, researchers say.

    Skeletal and genetic evidence puts these apes on a separate evolutionary trajectory from other orangutans in Sumatra (Pongo abelii) and Bornean orangutans (Pongo pygmaeus), says a team led by evolutionary anthropologist Michael Krützen of the University of...

    11/02/2017 - 12:00 Animals, Genetics, Evolution