Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More!

There are geoglyphs around the world that Ancient Astronaut Theorists believe could have encoded alien messages in this clip from Season 9, Episode 13, "Beyond Nazca". #AncientAliens
Subscribe for more from Ancient Aliens and other great HISTORY shows: histv.co/SubscribeHistoryYT

Find out more about the show and watch full episodes on our site:
po.st/AncientAliens

Check out exclusive HISTORY content:
History Newsletter: po.st/HistoryNewsletter
Website - po.st/HistoryWeb
Facebook - po.st/HistoryFacebook
Twitter - po.st/HistoryTwitter

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.

• Ancient Aliens: Secrets of the Serpeant Mound (Season 9) | History ( Download)
• Ancient Aliens: Is Mount Kailish an Ancient Nuclear Power Plant (Season 9) | History ( Download)
• Ancient Aliens: What's on the Reptilian Agenda (S14, E8) | Full Episode ( Download)
• Ancient Aliens: The Other Earth (S10, E6) | Full Episode ( Download)
• Ancient Aliens: Extraterrestrial Stone Spheres in Costa Rica (Season 9) | History ( Download)
• Ancient Aliens: The Impossible Stone Blocks of Puma Punku (Season 9) | History ( Download)
• Ancient Aliens: The Great Extraterrestrial Resurrection (Season 9) | History ( Download)
• Ancient Aliens: Extraterrestrial Bacteria and the Origins of Life (Season 9) | History ( Download)
• Ancient Aliens: The Great Mayan Disappearance (Season 9) | History ( Download)
• Ancient Aliens: Surviving the Alien Apocalypse (Season 9) | History ( Download)
• Ancient Aliens: Ancient Nuclear Energy at Mohenjo Daro (Season 9) | History ( Download)
• In Search of Aliens: Nazca's Ancient Geoglyphs (S1, E9) | Full Episode ( Download)
• Ancient Aliens: The Star Visitors Who Shared the Secrets of Civilization (S14, E4) | Full Episode ( Download)
• Ancient Aliens: Mysterious Creatures Creep Among Us ( Download)
• SERPENT MOUND Ancient Alien Mystery | Adams County, OH ( Download)