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Who are the beings with big heads and giant eyes that seem to have been visiting our planet for millennia? Known by researchers as the "greys," these mysterious beings have been depicted in rock-art and carved stone figures throughout the ages and all over the world. Who are they, what planet do they come from, and what do they want?
First Air Date : Apr 20, 2010
Last Air date : Mar 05, 2026
Episode : 285 Episode
Season : 22 Season
Runtime: 42:60 minutes
Studio: History
Country: United States of America
