Although Jenkins suggests that ancient Maya knowledge of this event was based on observations of the Dark Rift in the Milky Way as seen from Earth (this dark rift, it is said by some Mayan scholars, was believed by some Mayans to be one of the entrances to Xibalba), others see it as evidence of knowledge imparted via ancient contact with extraterrestrial intelligence. The relevance of modern Dark Rift observations to pre-Columbian and traditional Maya beliefs is strongly debated, and academic archaeologists reject all theories regarding extraterrestrial contact, but it is clear that the promotion of Mayanism through interest in 2012 is contributing to the evolution of religious syncretism in contemporary Maya communities. Psychonaut author Daniel Pinchbeck popularized New Age concepts about this date, linking it to beliefs about crop circles, alien abduction, and personal revelations based on the use of entheogens and mediumship in his 2006 book 2012: The Return of Quetzalcoatl.[23]