Add Yahoo as a preferred source to see more of our stories on Google. Man sees a strange object in the sky UFOs have become almost inseparable from the idea of aliens, but science treats those two ...

Earth’s deep past leaves plenty of unanswered questions. None currently proves an alien visit, but scientists know the ...

It poses no risk to Earth, according to NASA.

If the Milky Way ever hosted a star-faring civilization, its most durable monument may not be a beacon, a ruined spacecraft or a city-size machine. It may be dust. A team of researchers argues that ...

A former Pentagon UFO investigator claims the U.S. has recovered alien spacecraft and non-human bodies (i.e. alien ...