he is some historian or something that appears often in the History channel,
The still shot of Giorgio A. Tsoukalos originated from the History Channel series Ancient Aliens, a documentary series that explores the possibility that aliens may have visited in the past. The program is directed and produced by Giorgio A. Tsoukalos and first aired on April 20th, 2010.
The documentary focuses on the “Ancient Astronaut Theory” which states that extraterrestrial beings came to earth throughout the ancient times and helped shape history. For example, the Ancient Astronaut Theory insists that the pyramids were built by the help of alien technologies and that the great pyramids align with the constellation Orion; where some of the aliens may exist or came from. The show has come under some criticism for being “far fetched”, “hugely speculative” and “expound[ing] wildly on theories suggesting that astronauts wandered the Earth freely in ancient time.”