On Friday, May 31st, discover more about the UFO phenomenon than ever before in a six-part docuseries that goes inside the Pentagon’s research on the unexplained. Watch “Unidentified: Inside America’s UFO Investigation” on History. | HISTORY

34K views · 290 reactions | Follow along TONIGHT at 10/9c with an elite team of former military and intelligence officials, led by the man who once ran the Pentagon's secret UFO program. Watch the premiere of Unidentified: Inside America's UFO Investigation! | HISTORY | Facebook

3.4K views · 441 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