Caelum Incognitum — The interactive encyclopedia of ufology
Ancient astronauts hypothesis
Hypotheses & theories
A thesis that extraterrestrial visitors influenced ancient civilizations (pyramids, Nazca lines, myths). It was popularized by Erich von Däniken in Chariots of the Gods? (1968) and by television programs. Archaeologists reject it: the monuments are explained by the technical and social means of their builders.