He presented and co-produced the 2014 H2 series In Search of Aliens. He is a co-executive producer of Ancient Aliens, and he has appeared in more than 200 episodes since 2009. He was the editor of Legendary Times magazine from 1999 to 2008. Since 2002, Tsoukalos has appeared in programs broadcast by Travel Channel, History, Syfy, and National Geographic. He produced and directed the annual IFBB San Francisco Pro Grand Prix from 2001 to 2005. For several years he worked as a bodybuilding promoter and a volunteer in IFBB sanctioned bodybuilding contests, including Mr. He is a 1998 graduate of Ithaca College in Ithaca, New York, with a bachelor's degree in Communications. He is best known for his appearances on Ancient Aliens, a History channel series of which he is also producer. He is a ufologist and a promoter of the pseudoscientific ancient astronauts hypothesis. Tsoukalos ( / ˈ s uː k əl ə s/, Greek: Γεώργιος Τσούκαλος born 14 March 1978) is a Swiss-born writer, and television presenter and producer.