New fossil evidence suggests echidnas evolved from a water-dwelling ancestor, not a land-based one. The bone structure ...

Analysis of the fossil suggests that the only two egg-laying mammals, platypuses and land-based echidnas, both descended from ...

Alligators can live on land and in water, but that doesn't mean they can breathe underwater like fish. But how long can alligators stay underwater? And how long can they hold their breath? Let’s find ...

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

In the waters off New England, one of Earth's rarest mammals swims slowly, mouth agape. The North Atlantic right whale ...

A small bone found 30 years ago at Dinosaur Cove could revolutionize our understanding of echidnas and platypuses' evolution.

Public safety officials have been warning beachgoers to stay away from animals found stranded on the beach because they can ...

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

Since late February, more than 800 poisoned animals have been reported in just Los Angeles and Orange counties.

"We’re talking about a semiaquatic mammal that gave up the water for a terrestrial existence, and while that would be an extremely rare event, we think that’s what happened with echidnas ...