All species alive today, from chimpanzees to bacteria, are cousins that each have equally long lineages, rather than ...

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 ...

WASHINGTON (Reuters) - A fossilized skull of a small critter found in Utah underneath a dinosaur foot bone is providing insight into one of the most primitive mammalian groups and has scientists ...

WASHINGTON (Reuters) - 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 ...

We humans have long viewed ourselves as the pinnacle of evolution. People label other species as "primitive" or "ancient" and ...

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 ...

The Mesozoic Era, from 252 million years ago to 66 million years ago, is often called the Age of Dinosaurs. To generations of paleontologists, early mammals from the period were just tiny nocturnal ...

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 ...

A newly identified primitive mammal-like animal was agile, sleek and had a voracious appetite for meat. The animal, identified as a varanopid pelycosaur and part of the genus Aerosaurus, looked like ...

Primitive air-breathing fish, whose direct ancestors first appeared around 400 million years ago, show mechanisms controlling the heart which were previously considered to be found only in mammals -- ...