Australia’s kangaroos and wallabies are famous for their powerful hops, but how did they develop such extraordinary legs? New ...

A rare trapdoor spider, Aptostichus ramirezae, discovered in Iran, features a tail-like appendage, a trait thought extinct ...

POUGHKEEPSIE, N.Y. -- Robots wag their tail fins and bob along like bathtub toys in a pool at a Vassar College lab. Their actions are dictated by microprocessors housed in round plastic containers, ...

In a suspected case of reverse evolution, wild tomatoes in the Galápagos have developed a defense mechanism that hasn’t been seen in millions of years.