WASHINGTON — A shrew-like primitive mammal that inhabited China 165 million years ago represents a milestone in mammalian evolution, scientists said on Thursday, boasting a key anatomical trait in its ...

An artist’s impression depicts Kryoryctes at Dinosaur Cove in Australia. New research supports the hypothesis that Kryoryctes is a common ancestor of both the platypus and echidna. - Peter Schouten ...

A primitive ancestor of some of nature's fiercest meat-eating beasts looked more like a nimble squirrel than today's lions, tigers and bears, according to scientists who have uncovered new fossils in ...

Which group of mammals has the more 'primitive' reproductive strategy -- marsupials, with their short gestation periods, or humans and other placental mammals, which have long gestation periods? For ...

At a time when the vast majority of mammals were the size of shrews and mice, Vintana sertichi was a super heavyweight. Researchers have unearthed the skull of a primitive mammal with remarkably keen ...

Elated scientists have shown off a 130-million-year-old fossil that casts mammals in a new light by proving that in prehistoric times they fed on young dinosaurs. Scientists at the American Museum of ...

A shrew-like primitive mammal that inhabited China 165 million years ago represents a milestone in mammalian evolution, scientists said, boasting a key anatomical trait in its throat that helped usher ...

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