Mysterious black triangle objects speeding up to 1,800 miles per hour without vapor trails were spotted over secret US ...

An eerie sighting over Washington DC has sparked claims that alien craft are hiding in America's skies.

The seventh batch of UFO files was released by the Pentagon, featuring witness reports about mysterious objects soaring near ...

Add Yahoo as a preferred source to see more of our stories on Google. Is the truth out there? The United States government just gave up some of its files on inexplicable phenomena, releasing 17 pages ...

A little over a month after former President Barack Obama re-opened the door to discussions about extraterrestrial life, a new study shows how frequently people think they could have spotted aliens.