How could these massive ancient structures have been made without the help of giants?! See more in Season 19, Episode 10, "The Giants of Malta." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. ...

It is one archaeologists theory that extraterrestrials were once mating with humans. See more in this scene from Season 19, Episode 10, "The Giants of Malta." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens ...

Do the mysteries of Easter Island have something to do with extraterrestrial beings? See more in this scene from Season 2, Episode 10, "Alien Effigies." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for ...

These colossal statues are more than just statues, they may have connections to another world. See more in this scene from Season 2, Episode 10, "Alien Effigies." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel ...

Ancient Astronaut Theory has existed in popular culture for nearly 50 years, asking the question whether extraterrestrials visited Earth in the remote past. Find out more in Season 1, Episode 10, "The Alien Code." #InSearchOfAliens Subscribe for more HISTORY: ...

15% of humans have a rare bloodtype known as Rh negative. See what experts have to say about a possible link to extraterrestrial modification of humans in this collection of scenes from "The Prototypes." #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...