Giorgio A. Tsoukalos talks about the Alien Astronaut Theory & the new episodes of "Ancient Aliens" on The History Channel.

If aliens exist, surely Tim Peake is one of a select group of humans who have been the closest to them. The British astronaut spent six months in space between 2015 and 2016, living and working on the ...

In 1965, twelve astronauts vanished into deep space on a mission Earth never acknowledged—sent to live among aliens on a planet called Serpo. What they found was a world of impossible tech, but not ...