Holy Grail in America

Scientists examine underground clues from over 250,000 years ago that raise questions about our early relatives — and what it truly means to be human.

James Cameron and Simcha Jacobovici go on an adventure to find the lost city of Atlantis by using Greek philosopher Plato as a virtual treasure map.

Egyptian archaeologists dig into history, discovering tombs and artifacts over 4,000 years old as they search for a buried pyramid in this documentary.

The story of the triumphs and hurdles of brothers Barry, Maurice, and Robin Gibb, otherwise known as the Bee Gees. The iconic trio, who found early fame in the 1960s, went on to write over 1,000 songs and have 20 No. 1 hits throughout their career, transcending more than five decades of changing tastes and styles.

A look at the origins, history and conspiracies behind the "Majestic 12", a clandestine group of military and corporate figureheads charged with reverse-engineering extraterrestrial technology.