For decades, scientists have searched the cosmos for evidence of intelligent life beyond Earth. A new study suggests that if extraterrestrial civilizations have attempted to communicate with us, there ...

Add Yahoo as a preferred source to see more of our stories on Google. NASA/JPL-Caltech If there are indeed other beings in our galaxy, and they are sophisticated enough to traverse the expanse of ...

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 ...