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

After the demise of the dinosaurs following an asteroid strike 66 million years ago, mammals became Earth's dominant land ...

King vultures can neglect their chicks, so hand-feeding is necessary to ensure the baby survives, the Bronx Zoo said in a ...

Knife-toothed reptiles called sebecids went extinct on the mainland 10 million years ago. New fossil evidence puts them on an island 4 million years ago.

The love songs of these Panamanian frogs is a dinner bell for fringe-lipped bats. But how do they learn which frogs and toads ...

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