Philip Coppens (1971-2012) was one of the leading contributors to the History Channel's popular series Ancient Aliens and authored eight books, including the bestselling The Lost Civilization Enigma.
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Have we been visited by extraterrestrial beings? Did these "ancient aliens" contribute to the birth of human civilization? Do our ancient monuments contain evidence of their presence? The Ancient Alien Question reveals an array of astonishing tru... SEE MORE