They are long and slimy creatures which survive in most environments and attach themselves to their host to suck their blood.

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

It’s easy to judge an animal by its appearance. Unusual features, sharp claws, large size, or a reputation shaped by myths ...

Every year, scientists discover strange new things about the animal world — and 2024 was no exception. For example, this year, researchers found a creature so big it can be seen from space ...

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The story of two of the strangest animals on the planet just got a little ... The new research could upend what’s known of the evolution of the most primitive mammals alive today.