From ancient texts that describe portals through time to modern theories of parallel worlds, Ancient Aliens explores whether extraterrestrials have unlocked the secrets of time travel and alternate realities. See more in this Ancient Aliens compilation. Ch1 0:00 - Proof of Ancient Egyptian Time Travel Ch2 5:33 - Einstein’s Theories Prove Time Travel to an Alternate Universe Ch3 10:08 - Einstein Unlocks the Secrets of the Universe Ch4 14:52 - The Science of Ancient Egyptian Time Travel Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full episodes on our site: https://histv.co/AncientAliens Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Instagram - https://www.instagram.com/history TikTok - https://www.tiktok.com/@history "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.