Therefore, he said, monotremes provide a window into the origins of mammals on Earth. Peering inside an ancient fossil This fossilized humerus bone was discovered in 1993 at Dinosaur Cove.

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.

There is one example of this type of specimen that is housed at the London Natural History Museum. The principal curator for mammals, Richard Sabin, is responsible for this part of the museum, and ...

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.

Echidnas, also called spiny anteaters, are some of the weirdest mammals in the world. They're among the only mammals that don't give birth to live babies, and they also carry their young in a ...

The primitive history of these unusual animals, he said, is “truly crucial” to our understanding of how mammals (including humans) came to be. “Monotremes are these living relics from a very ...