The history of UFO sightings in North America goes back nearly 80 years. Explore the timeline of some of the most famous sightings and listen to testimonials from witnesses and the experts who dedicate their careers into uncovering the mysteries behind them. Solve the unknown in the brand new series, UFOs: Investigating The Unknown, Tuesdays at 8pm on National Geographic UK. | National Geographic UK

48K views · 1.6K reactions | Earlier this year, the U.S. government released a groundbreaking report on UFO sightings. What truths did this document reveal? On September 17, The Proof Is Out There returns with a special UFO investigative episode. Enjoy this sneak peek, then tune in at 10/9c, only on The HISTORY Channel! | Ancient Aliens | Facebook

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1.7M views · 1K reactions | UFO  | MY ART | Facebook