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 ...

Ancient astronaut theorists believe that the ancient Egyptian tombs of early leaders served a more extraterrestrial purpose, and sacred texts hold all of the answers, in this clip from Season 5, "Secrets of the Tombs." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date ...

In Shaanxi Province, China, farmers made an astonishing discovery of a massive underground mausoleum home to Emperor Qin Shi Huang's remains, in this clip from Season 5, "Secrets of the Tombs." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite ...

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 ...

In 1952 cameras spotted UFOs flying over the White House lawn in Washington D.C. - these sightings eventually lead to Project Blue Book, created by the U.S. government, in this clip from Season 5, "Aliens and Cover-Ups." Watch all new episodes of Ancient Aliens, returning soon, and stay up to ...

Rabbi Ariel Tzadok reveals a possible indigenous earth spirit that’s been visiting the property through disappearing portals, in this clip from Season 2, "There's No Place Like Homestead Two." Watch all new episodes of The Secret of Skinwalker Ranch, Tuesdays at 9/8c, and stay up to date on all ...

Ancient astronaut theorists believe that the ancient Iranian prophet, Zarathustra, followed commands from alien entities to guide the culture, in this clip from Season 5, "Prophets and Prophecies." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your ...

Watch all new episodes of Ancient Aliens returning Saturday, April 11th at 9/8c, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule. Ancient Astronaut Theorists believe that Hammurabi's Code could have actually been written by Babylonian Gods. Learn ...

Watch all new episodes of Ancient Aliens returning soon, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule. Archaeologists have found striking similarities between the ancient peoples of India and South America. Could there be an extraterrestrial ...

Watch all new episodes of Ancient Aliens returning soon, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule. Ancient astronaut theorists believe the mysterious Balanced Rock, located in New York State, could store massive amounts of electrical ...

Watch all new episodes of Ancient Aliens returning soon, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule. During the International UFO Congress, attendees shared their alien encounters, leading ancient astronaut theorists to conclude that various ...

Watch all new episodes of Ancient Aliens returning soon, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule. At Mystery Hill in New Hampshire, a giant stone slab is linked to the bodies of sacrificed victims, also known as Bog Bodies, in this clip ...