A new study suggests the platypus and echidna — the only egg-laying mammals — had a water-dwelling ancestor. The finding could upend what’s known of their evolution.

To shed more light on echidna evolution, Hand and her colleagues reexamined a humerus (upper forelimb bone) from the extinct monotreme Kryoryctes cadburyi, which lived in what is now southern ...

Biologists have confirmed the existence of a 200-million-year-old species of egg-laying mammal that has been assumed to be extinct. Suspected footage of Zaglossus attenboroughi -- the long-beaked ...

The long-beaked echidna had not been documented since the 1960s. Biologists have confirmed the existence of a 200-million-year-old species of egg-laying mammal that has been assumed to be extinct ...

An echidna seen on Clarke Island in November 2023. Photo from Tasmanian Aboriginal Centre via WWF-Australia Photos show the spiky, brown and white echidna walking in a clearing.

Life Endangered wombat's rare encounter with echidna caught on camera A camera trap at an Australian nature refuge has captured a boisterous interaction between a northern hairy-nosed wombat and ...

A trail camera on Clarke Island recorded an echidna for the first time in decades. Photos show the egg-laying mammal once feared locally extinct. Photo from Tasmanian Aboriginal Centre via WWF ...