On a clear summer day in 1947, businessman and civilian pilot Kenneth Arnold saw something strange in the sky.

The pilots dubbed the fireballs “foo fighters” but had no idea what they were. Plasma? Enemy tech? Aliens? We still haven’t ...

Some say that the Roswell UFO crash is not the only one to have had witnesses in this clip from Season 11, Episode 13, "Beyond Roswell." ...

If you found out we weren’t alone, if someone showed you, proved it to you, would that frighten you? From legendary ...