Ancient Aliens Season 13, Episode 14, "The Alien Phenomenon," celebrates the 50th anniversary of Erich von Däniken’s Chariots of the Gods? , revisiting core evidence like the Nazca Lines and ancient monuments. The feature-length episode explores the evolution of the ancient astronaut theory from fringe idea to global phenomenon, connecting historical interpretations of "gods" with modern UAP disclosures. View the episode on HISTORY.com . Watch Ancient Aliens Full Episodes, Video & More | HISTORY