Ancient Aliens: Terrifying Alien Encounters & UFO Abductions *2 Hour Marathon*

Have extraterrestrial beings shaped our history? See more in this 2 hour marathon from Ancient Aliens.

Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule.

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"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.

HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.