A newly analyzed fossil has revealed surprising insights into the evolutionary history of echidnas, suggesting that their ...

Although known to be capable swimmers, a potential one-kilometre ocean swim by an echidna has landed it in hospital.

Echidnas and another Australian oddity, the semi-aquatic platypus, are believed to have evolved from a common ancestor called Kryoryctes cadburyi that lived in Australia more than 100 million ...

SYDNEY: Australia’s burrowing echidna evolved from an aquatic ancestor in what scientists have described as an "extremely rare" evolutionary transition, according to a new study released Tuesday.

Found in Australia and New Guinea, the platypus and echidna are called monotremes, and they are unique for being the only mammals that lay eggs. The amphibious platypus has a bill and webbed feet ...

Australia's burrowing echidna evolved from a water-dwelling ancestor in an "extremely rare" biological event, scientists said Tuesday in a new study of the peculiar egg-laying mammals. With ...