Which television personality is most famous for appearing on a History channel series about evidence of past human-extraterrestrial contact?
Giorgio A. Tsoukalos: Giorgio A. Tsoukalos (Greek: Γεώργιος Α. Giorgio A. Tsoukalos:  He is most famous for his appearances on the television series "Ancient Aliens". Ancient Aliens:  Produced by Prometheus Entertainment in a documentary style, the program presents hypotheses of ancient astronauts and proposes that historical texts, archaeology, and legends contain evidence of past human-extraterrestrial contact.
i don't know