Ancient Astronaut Theorists made a shocking discovery related to the Indus people from Mohenjo Daro. See more in this clip from Aliens and Lost Civilizations. Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. ...

Spanish conquerors found thousands of Mayan handwritings that depicted secret rituals. See more in this clip from "Aliens and Lost Civilizations." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. ...

Experts believe there's more nonhuman activity happening in Antarctica that's being kept a secret. See more in this clip from, "Aliens and Lost Civilizations." #AncientAliens Watch all new episodes of Ancient Aliens, Fridays at 8/7c, and next day on The HISTORY Channel website at ...

Ancient astronaut theorists uncover Mesopotamian inscriptions that provide evidence of the Anunnaki existence thousands of years ago. See more in this clip from "Aliens and Lost Civilizations." Watch all new episodes of Ancient Aliens, Fridays at 8/7c, and next day on The HISTORY Channel ...