American Mystery

New theories may shed light on the fate of aviator Amelia Earhart, hijacker D.B. Cooper and the three daring prisoners who escaped from the Alcatraz Federal Penitentiary.

Newly declassified documents may link the Roswell crash to Nazi science; fresh evidence may reveal what's really hidden inside Area 51; experts investigate the dark secrets of the Dugway Proving Ground.

Experts investigate disturbing phenomena at Skinwalker Ranch; top-secret experiments may have been conducted at a former Air Force base in Long Island, N.Y.; new theories may explain why Mount Shasta is a magnet for paranormal activity.

Experts investigate the mystery of the Bermuda Triangle; researchers seek answers about strange sightings in Massachusetts; a murderer may be responsible for a string of unexplained disappearances in Bennington, Vt.

New theories about the Mantell UFO incident are revealed; scientific evidence may explain a UFO encounter in Texas; experts investigate what really crashed into a Canadian harbor.

Experts investigate the abduction of Betty and Barney Hill; new evidence surfaces about abductee Travis Walton; there may be an earthly explanation for the Mothman.