3.5K views · 444 reactions | 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 | Facebook

Now that UFOs or UAPs have been confirmed by the government, we're looking more closely at the largest unidentified flying object sighting in history. What happened that night in the desert of Arizona that was reportedly witnessed by thousands? Check out today's epic new video to find out! The truth is out there! | The Infographics Show