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

Spiny, snooty, and strange, echidnas are among Australia's wackiest animals. They're mammals, which means they feed their ...

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 ...

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

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 ...