A new study suggests the platypus and echidna — the only egg-laying mammals — had a water-dwelling ancestor. The finding ...

We may have gotten the evolutionary origins of the echidna backward, as new research suggests its ancestors probably lived in ...

A small bone found 30 years ago at Dinosaur Cove could revolutionize our understanding of echidnas and platypuses' evolution.

As the world's only surviving egg-laying mammals, Australasia's platypus and four echidna species are among the most ...

Australia's burrowing echidna evolved from a water-dwelling ancestor in an "extremely rare" biological event, scientists said ...

A controversial idea suggests the ancestors of echidnas were more like the platypus. For the first time, fossil evidence ...

Analysis of single bone may tell us if the platypus is an evolutionary anomaly — starting on land, then returning to water.

An analysis of the interior of a single bone suggests its owner was probably an aquatic or semi-aquatic animal. Since the ...

New research questions the evolutionary history of some of our most peculiar mammals.A small bone found 30 years ago at Dinosaur Cove in Victoria ...

A study of a 100-million-year-old bone suggests the ancient relative of the echidna and the platypus was semiaquatic — and ...