National Geographic – Is It Real : Ancient Astronauts

Synopsis:

With the 1968 publication of Erich von Daniken's Chariot of the Gods, the flood gates were opened for some "experts" to declare that Earth was visited long ago by extraterrestrials. Some of the claims are quite outrageous (cavemen were used as slaves to mine gold for their ET captors) while others seem more reasonable (the design of pyramids employed a surprising knowledge of astronomy). A misshapen human skull found in Mexico in 1930, the "Starchild", is exhibited as proof of cross-breeding between aliens and humans. That cranium is subjected to DNA tests to hopefully put that claim to rest.