Throughout history, many of the world's greatest thinkers have helped push civilization forward with their profound insights and extraordinary abilities. See more in Season 9, Episode 4, "The Genius Factor." Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of ...

Do stories from the ancient past hold evidence of alien overseers? See more in Season 9, Episode 3, "Aliens Among Us." Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...

The Great Sphinx in Giza is the largest and most studied monolithic sculpture on Earth, yet it remains one of humanities greatest mysteries. This ancient monolith defies explanation, pre-dates our earliest known civilizations and may hide the secrets of our very origins. While mainstream ...