Ancient Aliens: UFOs Spotted in Antarctica (Special)

The largely unexplored continent of Antarctica has long been subject to rumors of UFOs, underground tunnel networks, and concealed ancient structures, giving rise to speculation about an alien presence beneath its icy surface. Learn more in this clip from Season 2, Episode 6, MYSTERIES BENEATH THE ICE. Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: Find out more about the show and watch full episodes on our site: Check out exclusive HISTORY content: History Newsletter - Website - Facebook - Twitter - “Ancient Aliens“ explores the controversial theory that extraterrestrials have visited Earth for millions of years.