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 ...

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 ...

In February 1966, the Soviet space program launched the dogs Veterok and Ugolyok to beyond the protective Van Allen Belts, which they did to study the prolonged effects of space travel and the ...

(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 ...