There have been hundreds of unexplained UFO sightings in history, while most remained classified and brushed under the rug. Today, we're going to look at a few of the most famous alien encounters that ...

The truth may be closer than you think. “The Proof Is Out There: Alien Edition” returns with brand-new episodes Thursday, Feb. 26 at 10 p.m. on History Channel, and this special edition is diving deep ...