Graham Hancock - Transpersonal Experiences, Psychedelics and an Enquiry Into the Nature of Reality

Altered states of consciousness serve as a universal feature of shamanism and are frequently induced by visionary plants. Shared characteristics between shamanic and extraterrestrial abduction experiences include encounters with animal-like or therianthropic entities and strange surgical procedures. These parallels suggest that such encounters are not merely products of the brain on drugs but rather windows into an expanded or parallel reality. Prehistoric cave art, dating back 30,000 years, depicts similar visionary imagery, including therianthropes and geometric patterns. These artistic works likely reflect the experiences of ancient shamans who entered alternate realities and depicted their visions upon returning.