Documented cases of alien abductions led ancient astronaut theorists to believe that aliens were using human DNA to create hybrid humans, in this clip from Season 4, "The Greys." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite The HISTORY ...

The ancient Mayan civilization were time-keepers. They tracked essential patterns in their long count calendar, which could predict certain events, in this clip from Season 4, "The Doomsday Prophecies." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your ...

Ancient Astronaut Theorists believe mysterious geoglyphs discovered in Peru act as a supercomplex to connect different civilizations, in this clip from Season 17, "The Lost City of Peru." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

In the ancient city of Mecca, Muhammad is believed to have been a messenger sent by God himself, and with the help of angels, he was able to travel to other dimensions, in this clip from Season 5, "Strange Abductions." Watch all new episodes of Ancient Aliens, returning Friday, August 6 at 9/8c, ...

Ancient Astronaut theorists believe that this ancient Mayan city holds unusual secrets relating to wizards and Gods descending from the sky, in this clip from Season 5, "The Von Daniken Legacy." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite ...

Watch all new episodes of The Proof Is Out There, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows at http://history.com/schedule. Speculations arise after NASA releases a picture of the moon's craters that many believe to be created by an ancient ...

Ancient Astronaut Theorists believe that Moses’ encounter with God was very physical and changed his overall appearance - is there a possibility that extraterrestrials might’ve abducted him? Find out in this clip from Season 5, "Strange Abductions." Watch all new episodes of Ancient Aliens, ...

Ancient astronaut theorists believe that the remarkable folding ship gifted to one of the Viking gods from Loki was an alien spacecraft, in this clip from Season 5, "The Viking Gods." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The ...

The team conducts an underground experiment to measure the conductivity at Homestead 2, and the results are startling, in this clip from Season 2, "Shocking Revelations." Watch all new episodes of The Secret of Skinwalker Ranch, Tuesdays at 9/8c, and stay up to date on all of your favorite The ...

Ancient Astronaut Theorists believe that according to old Indian texts, Gods descended from the sky in Vimana - also known as flying vehicles, in this clip from Season 5, "The Von Daniken Legacy." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your ...

Watch all new episodes of The Proof Is Out There, Tuesdays at 10/9c, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule. A strange hum has disturbed people worldwide, but the source of this sound is unknown - experts investigate the cause of this ...

Chemist, Michel de Nostradamus, published an almanac containing verses that predicted the future, but nobody knows the source of these powers of predictions, in this clip from Season 5, "Prophets and Prophecies." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on ...