Who is (Erich Anton Paul von) Däniken?

Erich Anton Paul von Däniken (born 14 April 1935 in Zofingen, Aargau) is a Swiss author best known for his controversial claims about extraterrestrial influences on early human culture, in books such as Chariots of the Gods?, published in 1968. Däniken is one of the main figures responsible for popularizing the "paleo-contact" and ancient astronaut hypotheses.