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

103K views · 482 reactions | 8 sightings in a town of 20,000. Are these UFO sightings proof of aliens?  Contact premieres tonight at 10pm.  | Discovery Channel UK | Facebook

12K views · 210 reactions | The most enigmatic UFO incident in history exposed. Join Philip Coppens, star of History Channel's "Ancient Aliens" series in this and unprecedented expose on the Roswell Incident revealing that there is much more to this case than previously believed. | Free Documentary | Facebook

A nearly 22-minute video titled “The Roswell Incident” has been quietly uploaded to the National Archives, reigniting interest in an alleged UFO crash in New Mexico in 1947. Investigative journalist Ross Coulthart tells “NewsNation Prime” there is no known archival footage of the incident, and someone is “just having a bit of a fun game.” #UFO #UAP #Roswellincident | NewsNation