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E.g., 06/22/2018
E.g., 06/22/2018
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  •  Ichthyornis dispar skull and illustration
  • harbor seal
Your search has returned 543 articles:
  • Science Visualized

    Here’s how hefty dinosaurs sat on their eggs without crushing them

    Brooding birds from chickadees to ostriches sit squarely on their eggs. But scientists thought some of the heftier dinosaur ancestors of birds might not be able to do that without crushing the clutches. Now, a new study finds that certain dinos with a little extra junk in the trunk also had a clever brooding strategy: They sat within an open space at the center of a ring of eggs, rather than...

    05/15/2018 - 19:05 Paleontology
  • News

    This ancient fowl bit like a dinosaur and pecked like a bird

    A bird that lived alongside dinosaurs may have preened its feathers like modern birds — despite a full mouth of teeth that also let it chomp like a dino.

    A new 3-D reconstruction of the skull of Ichthyornis dispar, which lived during the Late Cretaceous epoch between 87 million and 82 million years ago, reveals that the ancient fowl had a small, primitive beak and a mobile upper jaw....

    05/02/2018 - 13:00 Animals, Evolution, Paleontology
  • News

    These seals haven’t lost their land ancestors’ hunting ways

    Some seals still eat like landlubbers.

    Just like lions, tigers and bears, certain kinds of seals have claws that help the animals grasp prey and tear it apart. X-rays show that the bones in these seals’ forelimbs look like those found in the earliest seals, a new study finds.

    Ancestors of these ancient seals transitioned from land to sea at some point, preserving clawed limbs...

    04/17/2018 - 19:09 Animals, Paleontology
  • News

    Colorful moth wings date back to the dinosaur era

    Tiny light-scattering structures that give today’s butterflies and moths their brilliant hues date back to the days of the dinosaurs.

    Fossilized mothlike insects from the Jurassic Period bear textured scales on their forewings that could display iridescent colors, researchers report April 11 in Science Advances. The fossils are the earliest known examples of insects displaying structural...

    04/11/2018 - 14:14 Paleontology, Biophysics, Animals
  • Reviews & Previews

    Fossils sparked Charles Darwin’s imagination

    Darwin’s FossilsAdrian ListerSmithsonian Books, $19.95

    Charles Darwin famously derived his theory of evolution from observations he made of species and their geographic distributions during his five-year voyage around the world on the H.M.S. Beagle. But in the introduction of On the Origin of Species, the naturalist also cites another influence: the thousands of fossils that he...

    04/08/2018 - 08:00 Evolution, History of Science, Paleontology
  • News in Brief

    This ancient lizard may have watched the world through four eyes

    About 50 million years ago, a monitor lizard in what is now Wyoming perceived the world through four eyes. Saniwa ensidens is the only known jawed vertebrate to have had two eyelike photosensory structures at the top of the head, in addition to the organs we commonly think of as eyes, researchers report April 2 in Current Biology.

    The structures are called the pineal and parapineal...

    04/05/2018 - 12:19 Paleontology, Earth, Neuroscience
  • Letters to the Editor

    Readers debate dinosaur designation and more

    Diagnosis dinosaur

    Some scientists are shaking up the dinosaur family tree and raising questions about which features define the ancient reptiles, Carolyn Gramling reported in “New fossils are redefining what makes a dinosaur” (SN: 3/3/18, p. 18).

    “I am a bit put out by the continuing references to dinosaurs as being reptiles,” reader David Persuitte wrote. Dinosaurs’ legs were...

    04/05/2018 - 07:52 Paleontology, Evolution, Planetary Science
  • Feature

    New fossils are redefining what makes a dinosaur

    “There’s a very faint dimple here,” Sterling Nesbitt says, holding up a palm-sized fossil to the light. The fossil, a pelvic bone, belonged to a creature called Teleocrater rhadinus. The slender, 2-meter-long reptile ran on all fours and lived 245 million years ago, about 10 million to 15 million years before scientists think dinosaurs first appeared.

    Nesbitt, a paleontologist at...

    02/21/2018 - 16:00 Paleontology, Evolution
  • News

    Fossil footprints may put lizards on two feet 110 million years ago

    Fossilized footprints from an iguana-like reptile provide what could be the earliest evidence of a lizard running on two legs.

    The 29 exceptionally well-preserved lizard tracks, found in a slab of rock from an abandoned quarry in Hadong County, South Korea, include back feet with curved digits and front feet with a slightly longer third digit. The back footprints outnumber the front ones...

    02/15/2018 - 13:19 Paleontology, Animals, Evolution
  • Science Visualized

    This ancient creature looks like a spider with a tail

    What looks like a spider, but with a segmented rear plus a long spike of a tail, has turned up in amber that’s about 100 million years old.

    Roughly the size of a peppercorn (not including the tail, which stretches several times the body length), this newly described extinct species lived in forests in what is now Myanmar during the dinosaur-rich Cretaceous Period.

    Spiders as their...

    02/06/2018 - 15:35 Paleontology, Animals, Evolution