New research shows evidence of man-made pyramids in Antartica, in this clip from Season 3, "Mysterious Ancient Ruins."

Watch all new episodes of The UnXplained, Fridays at 9/8c, and stay up to date on all of your favorite The HISTORY Channel shows at history.com/schedule.

#TheUnXplained

Subscribe for more from The UnXplained and other great The HISTORY Channel shows:
histv.co/SubscribeHistoryYT

Watch more The UnXplained on YouTube in this playlist:
histv.co/UnXplainedYT

Find out more about the show and watch full episodes on our site:
histv.co/unxplained

Check out exclusive The HISTORY Channel content:
History Newsletter - histv.co/newsletter
Website - histv.co/History
Facebook - histv.co/Facebook
Twitter - histv.co/Twitter

From the producers of Ancient Aliens and The Curse of Oak Island comes The UnXplained, a one-hour, non-fiction series that explores the world's most fascinating, strange and inexplicable mysteries.

Hosted and executive produced by Golden Globe and Emmy Award-winning actor William Shatner (Star Trek, Boston Legal) each episode will feature compelling contributions from scientists, historians, witnesses and experiencers-each seeking to shed light on how the seemingly impossible actually can happen.

The HISTORY Channel® 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.