We may have gotten the evolutionary origins of the echidna backward, as new research suggests its ancestors probably lived in the water, not on land.

Australian mammals glow under UV light due to specific molecular compounds, revealing hidden fur light secrets.

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

Learn more about the difference between bioluminescence and photoluminescence, and about the particular chemical compounds ...

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" event, scientists said in a new ...

The story of two of the strangest animals on the planet just ... most primitive mammals alive today. Found in Australia and New Guinea, the platypus and echidna are called monotremes, and they ...

Found in Australia and New Guinea, the platypus and echidna are called monotremes ... kicking up dirt as the animal burrows into the ground. Neither animal has teeth, and though they both produce ...