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E.g., 03/19/2019
E.g., 03/19/2019
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  • starry dwarf frog
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Your search has returned 474 articles:
  • Introducing

    Meet India’s starry dwarf frog — a species with no close relatives

    A tiny new frog species discovered in tropical forests of southwest India has been one of a kind for millions of years.

    Palaniswamy Vijayakumar and his colleagues first spotted the new species one night in 2010 while surveying frogs and reptiles roughly 1,300 meters up in India’s Western Ghats mountain range. The frog hardly stood out — its brown back, orange belly and starlike spots...

    03/18/2019 - 10:00 Animals, Evolution
  • News

    The first male bees spotted babysitting are mostly stepdads

    Scientists have discovered the first case of male bees babysitting, and it turns out that these males often aren’t biological bee dads but hopeful stepdads of the youngsters. 

    Females of a small bluish-black Mediterranean bee (Ceratina nigrolabiata) dig out the pith of plant stems to make a nest, where a mom lays her eggs. Unlike honeybees, these are solitary bees with no colony of...

    03/11/2019 - 15:01 Animals, Evolution
  • News

    Human encroachment threatens chimpanzee culture

    From deep inside chimpanzee territory, the fieldworkers heard loud bangs and shouts. Hidden video cameras later revealed what the chimps in the Boé region of Guinea-Bissau were up to. Males were throwing rocks at trees and yelling.  

    Researchers don’t fully understand why the apes engage in this rare behavior, known as accumulative stone throwing. And scientists may not have much time to...

    03/07/2019 - 14:44 Conservation, Evolution, Anthropology
  • News

    This parasitic cuckoo bird shows cheaters don’t always get ahead

    Cheating pays, sort of. But for a glossy blue-black bird with a bright yellow eye, cheating doesn’t outdo regular honest parenting.

    The greater ani, a type of cuckoo found from Panama to the Amazon Basin, usually starts out as a dutiful parent. Two or three male-female pairs typically build and fill a communal nest “like a big basket of eggs,” says behavioral ecologist Christina Riehl of...

    02/27/2019 - 15:22 Animals, Evolution
  • News

    A deer-sized T. rex ancestor shows how fast tyrannosaurs became giants

    A new dinosaur shows that even Tyrannosaurus rex had humble beginnings.

    Dubbed Moros intrepidus, or “the harbinger of doom,” the new species is one of the smallest tyrannosaurs yet discovered from the Cretaceous Period. Analyses of the animal’s fossilized leg show that the creature would have stood only 1.2 meters at the hip, and weighed an estimated 78 kilograms — about the size of a...

    02/21/2019 - 09:00 Paleontology, Animals, Evolution
  • News

    Evolutionarily, grandmas are good for grandkids — up to a point

    Grandmothers are great — generally speaking. But evolutionarily speaking, it’s puzzling why women past their reproductive years live so long.

    Grandma’s age and how close she lives to her grandchildren can affect those children’s survival, suggest two new studies published February 7 in Current Biology.  One found that, among Finnish families in the 1700s–1800s, the survival rate of young...

    02/07/2019 - 11:00 Evolution, Science & Society, Anthropology
  • News

    Giant pandas may have only recently switched to eating mostly bamboo

    When it comes to deciding what’s for breakfast, lunch or dinner, pandas have it easy: Bamboo, bamboo and more bamboo. But that wasn’t always the case.

    Although modern giant pandas (Ailuropoda melanoleuca) chow almost exclusively on bamboo in the mountain forests of central China, these bears’ diet was much broader not so long ago, researchers report online January 31 in Current Biology....

    01/31/2019 - 11:00 Animals, Evolution, Paleontology
  • News

    Male birds’ sexy songs may not advertise their brains after all

    After some 20 years of theorizing, a scientist is publicly renouncing the “beautiful hypothesis” that male birds’ sexy songs could indicate the quality of their brains.

    Behavioral ecologist Steve Nowicki of Duke University called birdsong “unreliable” as a clue for choosy females seeking a smart mate, in a paper published in the March 2018 Animal Behaviour. He will also soon publish...

    01/25/2019 - 07:00 Animals, Evolution
  • News

    A four-legged robot hints at how ancient tetrapods walked

    Orobates pabsti lived between 280 million and 290 million years ago, but it was pretty advanced at doing the locomotion.

    Using computer simulations, re-created skeletons, fossil trackways and a walking robot dubbed the OroBOT, scientists found that this ancient four-footed creature had a surprisingly efficient gait. The result suggests that developing a more advanced way of walking may...

    01/16/2019 - 13:27 Paleontology, Evolution
  • News

    A jumping spider mom nurses her brood for weeks on milk

    Mom nurses her young for weeks on milk that has four times the protein of a cow’s. Yet this mother’s not a mammal. She’s a jumping spider with eight legs and a taste for fruit flies.

    We mammals have named ourselves after our mammary glands. Yet other animals, from tsetse flies to pigeons, secrete their own versions of milk for their babies. The newly discovered nursing in Toxeus magnus...

    11/29/2018 - 16:03 Animals, Evolution