In a groundbreaking discovery, paleontologists unearthed a 93-million-year-old crocodile fossil in Queensland, Australia. The ...

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

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

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

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