Manage episode 258685019 series 2479923
If you enjoy the stories told in Extraterrestrial, check out this episode from our series Conspiracy Theories: The Great pyramid of Giza. The Nazca Lines. The Moai Statues of Easter Island. Long considered engineering feats of ancient civilizations, there are some theories that are still discussed today that these ancient monuments may be the work of extraterrestrial civilizations.