"Though at this point with absolutely no sign of him, maybe the best hypothesis is that aliens beamed him up to the mothership," wrote Neil McCasland's wife ...

Retired Air Force general William McCasland vanishes in Albuquerque. Massive search with drones, dogs, and helicopters finds no clues after two weeks.

Add Yahoo as a preferred source to see more of our stories on Google. For decades, humanity has scoured the cosmos for any signs that we aren't alone in the universe. But now, researchers at the SETI ...

A “red alert” involving the private Blue Ghost mission in lunar orbit a year ago highlights a growing number of incidents above Earth’s neighbor.