Were these lethal weapons the product of human innovation--or were they created with help from another, otherworldly source? See more in this compilation from Ancient Aliens. Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The ...

For thousands of years, mankind has told tales of encounters with strange, soulless creatures. Are these beliefs merely man made fabrications--or could there be extraterrestrial origins in earthly encounters with the undead? See more in Season 2, Episode 9, "Aliens: Dead or Alive." Watch all ...

Are recent breakthroughs in medicine the result of years of research? Or does the knowledge of healing really come from an otherworldly source? See more in Season 6, Episode 6, "Alien Operations." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your ...

One of the most compelling arguments for the Ancient Astronaut theory is the extraordinary engineering behind the construction of megalithic sites worldwide. See more in this scene from Season 1, Episode 1, "Extraordinary Engineering." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, ...

Did we lose access to technologies of ancient civilizations? See more in this compilation from Ancient Aliens. Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...

Si una nave extraterrestre se estrelló en Roswell y el Ejército lo quiso encubrir ¿Fueron capaces de ocultar todas las pruebas y restos de metal? Este Geólogo está convencido de no y de que ha encontrado un resto que olvidaron enterrado. Descubriremos la verdad que se esconde este pequeño trozo ...

Puma Punku in Bolivia features some of the largest stone blocks on Earth, each carved with incredible precision. See more in this scene from Season 20, Episode 20, "Resurrecting Puma Punku." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite ...

Many ancient cities are thought to be lost forever-if they ever existed at all. See more in this compilation from Ancient Aliens. Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

The Sumerians in ancient Mesopotamia achieved over one hundred "firsts" for human civilization. Advances in writing, agriculture, science, mathematics, medicine, astronomy, transportation, building, military, schools and city planning, all originated in Sumer. See more in this marathon from ...

Dr. Travis Taylor examines some mysterious Chilean UFO footage, in this clip from Season 15, "Destination Chile." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...

Around the world and throughout history, people have reported seeing very similar types of unidentified objects in the sky. See more in this compilation from Ancient Aliens. Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The ...

If ancient aliens visited Earth, what was their mission, and is there evidence that points to when they will return? See more in Season 1, Episode 3, "The Mission." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY ...