Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More!

Nikolai Tesla reported receiving communication from otherworldly places and Ancient Astronaut Theorists believe this helped him build his inventions in this clip from Season 9, "The Tesla Experiment." #AncientAliens
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"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.

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