
History's Greatest Mysteries
Takes the most well-known mysteries, and challenges everything we know about them. Did Adolf Hitler commit suicide in the final days of World War II?

Takes the most well-known mysteries, and challenges everything we know about them. Did Adolf Hitler commit suicide in the final days of World War II?

Takes the most well-known mysteries, and challenges everything we know about them. Cleopatra, Egypt's last pharaoh, mysteriously died in 31 B.C. body still lost.

Takes the most well-known mysteries, and challenges everything we know about them. A Boeing 777, carrying 239 people, vanishes over the Indian Ocean. What happened?

Takes the most well-known mysteries, and challenges everything we know about them. It may be the world's most sought-after relic, but what is the Holy Grail?

Takes the most well-known mysteries, and challenges everything we know about them. Eric Ulis believes he's found the true location where Cooper landed.

Takes the most well-known mysteries, and challenges everything we know about them. Thieves stole half a billion dollars in masterpieces from the Gardner Museum.

Takes the most well-known mysteries, and challenges everything we know about them. Thieves stole half a billion dollars in masterpieces from the Gardner Museum.

Takes the most well-known mysteries, and challenges everything we know about them. Did Adolf Hitler commit suicide in the final days of World War II?

Takes the most well-known mysteries, and challenges everything we know about them. Cleopatra, Egypt's last pharaoh, mysteriously died in 31 B.C. body still lost.

Takes the most well-known mysteries, and challenges everything we know about them. A Boeing 777, carrying 239 people, vanishes over the Indian Ocean. What happened?

Takes the most well-known mysteries, and challenges everything we know about them. It may be the world's most sought-after relic, but what is the Holy Grail?

Takes the most well-known mysteries, and challenges everything we know about them. Eric Ulis believes he's found the true location where Cooper landed.

"Ancient Aliens" explores the theory that extraterrestrials have visited Earth. The White House has consistently denied having any knowledge of alien crafts.

"Ancient Aliens" explores the theory that extraterrestrials have visited Earth. The White House has consistently denied having any knowledge of alien crafts.

"Ancient Aliens" explores the theory that extraterrestrials have visited Earth. Stories were told of ancestors that came to Earth from the Pleiades star cluster.

"Ancient Aliens" explores the theory that extraterrestrials have visited Earth. In 2017, a strange, cigar-shaped object entered our solar system.

"Ancient Aliens" explores the theory that extraterrestrials have visited Earth. Crystal Skulls, thought to contain universal secrets, are disputed.

"Ancient Aliens" explores the theory that extraterrestrials have visited Earth. Scientists are challenged by unidentified strains of bacteria.

"Ancient Aliens" explores the theory that extraterrestrials have visited Earth. Might the tools and technology of ancient builders have come from other galaxies?

"Ancient Aliens" explores the theory that extraterrestrials have visited Earth. Global ancient rites may link us to other dimensions, mimicking aliens.