Discover the astonishing world of animals with incredible facts! Octopuses boast three hearts and blue blood, while cows form ...

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 ...

This video dives into the bizarre and often overlooked wildlife that thrives in Costa Rica’s dense rainforests. Viewers ...

Research on fossils reveals that ankylosaurs’ iconic tail weapons evolved much earlier than scientists had previously believed. The world’s most unusual dinosaur is even stranger than scientists ...

Colugos are sometimes called flying lemurs – even though they don’t fly and are not lemurs. But what they really are, is a ...

(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 ...