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!
Massive obelisks filled with quartz were erected across the ancient world. Ancient Astronaut Theorists suggest that these crystal towers could actually be antennae for communicating with extraterrestrials in this clip from Season 9, “The Monoliths”. #AncientAliens
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