Antarctica's Secret Alien Cover-Up | Ancient Aliens

Experts believe there's more nonhuman activity happening in Antarctica that's being kept a secret. See more in this clip from, “Aliens and Lost Civilizations.“ #AncientAliens Watch all new episodes of Ancient Aliens, Fridays at 8/7c, and next day on The HISTORY Channel website at 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 The HISTORY Channel content: History Newsletter - Website - Facebook - Twitter - “Ancient Aliens“ explores the controversial theory that extraterrestrials have visited Earth for millions of years. The HISTORY® Channel, a division of A E Networks, is the premier destination for his