Nature doesn’t always play by the rules. For every majestic lion or elegant eagle, there’s a creature so bizarre it looks like a science experiment gone rogue.

Narwhals are one of the most interesting and weirdest animals on the planet. These shy whales boast a long horn (that is actually a tooth) and live in the cold waters of the Arctic. Generally speaking ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The story of two of ...

(CNN) — The story of two of the strangest animals on the planet just got a little stranger, thanks to clues revealed by a lone fossil specimen that scientists now say represents a long-extinct ...

An artist’s impression depicts Kryoryctes at Dinosaur Cove in Australia. New research supports the hypothesis that Kryoryctes is a common ancestor of both the platypus and echidna. - Peter Schouten ...