1
The Mayan Conspiracy
Potential alien influence on the Mayan culture, including its disappearance and legacy.
2
The Doomsday Prophecies
The end of the Mayan Long Count Calendar and potential alien explanations for what may come.
3
The Greys
Beings with big heads and giant eyes are called the greys and have been depicted in ancient art.
4
Aliens and Mega-Disasters
Natural disasters in the ancient world may have originated with the meddling of celestial beings.
5
The NASA Connection
Research into alien contact in the recent past including evidence from astronauts and scientists.
44min | Aired on Mar 09, 2012 | TV-PG | CC
6
The Mystery of Puma Punku
A 14,000-year-old set of ruins with complex interlocking blocks defies earthly explanation.
7
Aliens and Bigfoot
Some theorize that Bigfoot is connected to an alien species that visited in ancient times.
8
The Da Vinci Conspiracy
Examining Leonardo da Vinci's paintings, sketches and journals looks for alien technology.
9
The Time Travelers
The possibility that alien sightings may be evidence of time travelers from the future.
10
Aliens and Dinosaurs
Angkor Wat, Cambodia, world's largest ancient temple, curiously has a picture of a stegosaurus.
season 4
Follow HISTORY
Don't miss sneak peeks, viral clips and more!
