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

Did this UFO enthusiast finally find what he was looking for? 🛸 Don't miss #AlienEncounters: Fact or Fiction on Wednesday at 10p ET on Discovery. | Discovery

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