A mysterious metal shard, once thought to be a piece of a UFO that crashed in 1947, has sparked years of wild speculation. UFO enthusiasts and alien theorists hoped it could be a clue that would ...

The popular history docuseries The Proof Is Out There returns to the History Channel with its season six premiere Friday, March 6 at 10/9c. During the season six premiere episode, a high-tech U.S.