Aliens and Lost Worlds (S03E08)

Whispers of forgotten realms and dilapidated structures tell tales of our planet’s lost civilizations. But is there evidence of extraterrestrial visitors concealed within the remnants of these ancient societies? Intriguing inscriptions hint that the Mayan city of Copan might have been governed by the offspring of alien entities. Additionally, some theorists propose that the Nazca people modified their own forms and their environment to beckon celestial beings. Are the remarkable feats of these bygone cultures simply the stuff of legend, or could they stem from something beyond our world?