Could Leonardo da Vinci’s mysterious disappearance be evidence of an alien encounter? Uncover more in this clip from Season 4, "The Da Vinci Conspiracy." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows at ...

In Norway, an eyewitness catches what appears to be strange unidentified objects, explode, multiply, then travel towards the earth, see more in this clip from Season 2, "Jetpack Man & Alien Ocean Egg." Watch all new episodes of The Proof Is Out There, returning Friday, December 3 at 10/9c, and ...

Ancient Astronaut Theorists believe there are hidden alien messages in Leonardo Da Vinci’s famous painting - The Mona Lisa. Discover more in this clip from Season 4, "The Da Vinci Conspiracy." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite ...

Ancient astronaut theorists believe that extraterrestrial interference might have impacted the way humans evolved, in this clip from Season 4, "Aliens and Bigfoot." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows ...

According to ancient Mesopotamia texts, the Epic of Gilgamesh tells the tale of a giant creature of extraterrestrial origins, in this clip from Season 4, "Aliens and Bigfoot." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY ...

Not everything is as it seems in Wichita, Kansas. An eyewitness spots a strange object in the sky, in this clip from Season 2, "Wichita UFO & Booming Sea Sound." Watch all new episodes of The Proof Is Out There, Fridays at 10/9c, and stay up to date on all of your favorite The HISTORY Channel ...

On September 12th, 1991, NASA captured strange extraterrestrial activity but has since kept it hidden, in this clip from Season 4, "The Nasa Connection." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows at ...

Eyewitness video taken in England shows a strange orb splitting multiple times in the sky. Experts examine this footage for answers, in this clip from Season 2, "Sasquatch Sounds & Undersea Alien." Watch all new episodes of The Proof Is Out There, Fridays at 10/9c, and stay up to date on all ...

Off the coast of Cornwall, a glowing orb has been spotted flying at supernatural speeds, in this scene from Season 2, "Alaskan Sea Monster & Mystery Jungle Jet." Watch all new episodes of The Proof Is Out There, Fridays at 10/9c, and stay up to date on all of your favorite The HISTORY Channel ...

A mysterious rock bearing a cryptic design was discovered in Roswell, New Mexico in 2004. Now coined "The Roswell Rock," this piece of stone is unusually smooth and possesses unique magnetic properties, in Season 1, Episode 4, "The Roswell Rock." #InSearchOfAliens Subscribe for more HISTORY: ...

Ancient astronaut theories believe that the tsunami of Crete in 365 AD could’ve been caused by an ancient god known as Poseidon, in this clip from Season 4, "Aliens and Mega-Disasters." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite The ...

The northern lights take a drastic turn when UFOs seem to erupt in the sky. Is this proof of extraterrestrial life? Find out in this clip from Season 2, "Jetpack Man & Alien Ocean Egg." Watch all new episodes of The Proof Is Out There, Fridays at 10/9c, and stay up to date on all of your ...