Revisit the most compelling mysteries explored over the past 15 years of "Ancient Aliens." Experts like Giorgio Tsoukalos, David Childress, William Henry, and Jason Martell engage in conversations around Ancient Astronaut Theory in each episode.
2018
2005
2011
2016
2012
2019
2017
2014
2008
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2004
1976
1996
1999
1998
