Quetzalcoatl ("winged serpent" or "plumed serpent") is the Aztec or Nahuatl name for the Feathered-Serpent deity of ancient Mesoamerican culture from whom, according to myth, almost all Mesoamerican peoples claim descent.
To the Maya area he was approximately equivalent to Kukulkan, which also translates as "feathered serpent" in different Mayan languages. In Peru he was called Amaru.
William "Bill" Cooper was an American radio broadcaster, and author known for his 1991 book Behold a Pale Horse, in which he warned of multiple global agendas, some involving extraterrestrial life.