This episode explores the global prevalence of serpent deities and reptilian imagery in ancient cultures, suggesting they might represent encounters with extraterrestrial reptilian beings. Ancient astronaut theorists point to the Mesopotamian god Enki, the feathered serpent Quetzalcoatl of Mesoamerica, the Naga of Hindu and Buddhist traditions, and biblical references to the serpent in Eden as potential evidence of a worldwide reptile-like alien presence. The episode highlights Paul MacLean's 1960 triune brain model, which proposed a "reptilian brain" component in humans, and connects it to 2018 research by Gilles Laurent finding unexpected chemical similarities between reptile and human brains. Ancient astronaut theorists like William Henry and Michael Salla argue these neurological connections, combined with recurring myths of "lizard men" and underground serpent people, suggest an ongoing reptilian extraterrestrial influence on humanity.
Mainstream evolutionary biology does acknowledge that humans share certain traits with reptiles—including aspects of skin structure, the amniotic sac, and vestiges like the coccyx (our evolutionary "tail")—because all vertebrates share common ancestors from hundreds of millions of years ago. However, MacLean's triune brain model has been largely discredited by modern neuroscience, which shows brain evolution is far more complex than neat reptilian-mammalian-primate layers. The global serpent deity motif is explained by anthropologists as symbolic: snakes shed their skin (rebirth), move between earth and water (liminality), and inspire both fear and fascination across all human cultures independently. For viewers interested in comparative mythology and evolutionary neuroscience, the episode offers an intriguing tour of how ancient symbols might reflect deep biological inheritances, even if the extraterrestrial hypothesis remains speculative.
Ancient ruins of Thera
Greece · Ancient Greek
Ancient astronaut theorists cite megalithic walls at Thera as nearly identical to those in Peru, suggesting a shared reptilian architect responsible for a global megalithic building tradition. Mainstream archaeology associates ancient Thera (Santorini) primarily with the Minoan civilization and the catastrophic volcanic eruption of approximately 1600 BC.
Dulce Air Force Base (underground)
United States · Modern
Ancient astronaut theorists and UFO researchers claim that a secret multi-level subterranean military base beneath Dulce, New Mexico houses extraterrestrial species including reptilians, and that whistleblower Phil Schneider encountered these beings during construction. No verified evidence of such a base exists; mainstream sources do not confirm a secret underground military installation of this kind at Dulce.
Gympie Pyramid
Australia · Aboriginal Australian
Theorists include the Gympie Pyramid among global megalithic sites they attribute to a shared reptilian builder civilization that spread advanced stonework knowledge worldwide. Mainstream archaeologists and geologists generally regard the terraced hill near Gympie as a natural formation or the remnants of historical agricultural terracing by European settlers.
Hittite cities of Turkey
Turkey · Hittite/Phrygian/Byzantine
Theorists suggest that devastated Hittite megalithic towers and walls show evidence of missile strikes or gigantic explosions consistent with an ancient extraterrestrial war. Mainstream historians attribute the destruction of Hittite cities to the Late Bronze Age collapse around 1200 BC, involving invasions, internal rebellions, and possible drought.
Mannarasala Temple
India · Hindu / Buddhist / Jain
Ancient astronaut theorists point to the temple's 30,000 snake idols and local legends that the naga king still resides there as evidence of a real reptilian race venerated and possibly still present. In Hindu tradition, the nagas are semidivine cobra beings associated with subterranean realms, reflecting a rich mythological tradition rather than literal extraterrestrial presence.
Mount Archuleta and Archuleta Mesa
United States · Modern
Ancient astronaut theorists claim that below Mount Archuleta and Archuleta Mesa lie deep underground bases operated by reptilian beings for centuries, corroborated by Jicarilla Apache oral traditions of star people living underground. No mainstream scientific or governmental source has confirmed subterranean extraterrestrial installations beneath these landforms.
Son Doong Cave
Vietnam · Modern
Ancient astronaut theorists and UFO investigators claim that multiple eyewitness accounts, including a Vietnamese logger's encounter, describe a reptile-humanoid dragon-like creature inhabiting the cave system. Mainstream sources identify Son Doong as the world's largest cave by volume, notable for its unique internal ecosystem, with no scientific support for reptilian inhabitant claims.