Ancient Aliens has examined the oldest and most mysterious rock art on Earth-up close and in person. Now, Giorgio Tsoukalos takes a look back at the incredible hieroglyphs, petroglyphs, and geoglyphs that he believes tell a worldwide story-of alien visitation.
Stars: Giorgio A. Tsoukalos, William Henry, Luca Giarelli
Director(s): Robin Feinberg
Writer(s): Kevin Burns, Max Thompson, Kristina Djokic