Scientists searching for extraterrestrial intelligence are testing a new possibility: alien civilizations might transmit ...

Scientists have pieced together a pretty clear picture of what life was like on Earth thousands, even millions of years ago.

Alien life may not need the kind of home humans instinctively search for. Some of the strangest possibilities begin once ...

It is often suggested that this may have already happened: alien technosignatures may have reached Earth during the past six decades but have gone unnoticed. If that is true, it suggests that more ...

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 ...