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

Imagine a creature that looks like a mashup from a child’s wildest dreams: a furry animal with the bill of a duck, the tail ...

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

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