Known as Quetzalcoatl in the Nahuatl language, or Kukulkan in Mayan, this entity was worshipped as a god. Upon its departure, Quetzalcoatl told the Mayans how he would one day return to Earth.

Pinchbeck, journalist and author of the drug-riddled psychonaut investigation Breaking Open the Head, has set out to create an ""extravagant thought experiment"" centering around the Mayan ...