Earth is home to some truly unbelievable life forms. From transparent animals and deep-sea nightmares to creatures with blue blood, multiple hearts, and bizarre body shapes, evolution has produced ...

When people imagine life on other planets, they often picture creatures unlike anything found on Earth. Perhaps they have ...

The nature of space, time and the evolution of life on Earth mean it’s unlikely extraterrestrial life has visited our home planet.

With the release of Disclosure Day, Steven Spielberg’s new film about aliens, a question as old as science fiction itself resurfaces: if aliens were to arrive on Earth, would they come to conquer us, ...