"The Visitors" explores the possibility that extraterrestrial beings have interacted with human civilizations throughout history, drawing on traditions from cultures around the world. Ancient astronaut theorists point to the Dogon people of Mali, who possess detailed astronomical knowledge about the Sirius star system they attribute to a star god named Amma. The Hopi and Zuni celebrate Kachinas—sky gods depicted in ceremonies with headdresses and costumes that some suggest resemble modern protective gear. Chinese legends describe the Han leader Huangdi arriving on Earth aboard a flying yellow dragon, which theorists like those featured propose could have been a spacecraft. The episode frames these accounts as part of a global pattern of contact that may have shaped human development.
Mainstream archaeology and anthropology offer alternative explanations for these traditions: the Dogon astronomical knowledge has been disputed by scholars who suggest it may have been introduced by Western visitors in the 20th century, while the Kachina and Chinese dragon imagery can be understood as mythological symbolism reflecting natural phenomena and cultural values rather than literal visitation accounts. The episode remains compelling for its catalog of cross-cultural sky god narratives and its underlying question about humanity's place in the cosmos—a question made more urgent by contemporary exoplanet discoveries and the statistical probability, as scientists like Sara Seager note, that among hundreds of billions of galaxies, Earth is unlikely to be unique.
Allen Hills, Antarctica (ALH 84001 meteorite find site)
Antarctica · Modern
Theorists cite the 1996 announcement that Martian meteorite ALH 84001, found in Antarctica, contained evidence of fossilized microbial life as scientific confirmation that life — and by extension intelligence — originated off-Earth, supporting panspermia and ancient astronaut narratives. Mainstream astrobiologists acknowledge the meteorite as significant but note the interpretation of biosignatures remains scientifically contested.
Han Dynasty China
China · Han Dynasty
Ancient Aliens discusses Chinese legends of Han leader Huangdi arriving on Earth on a flying yellow dragon, suggesting this may have been a spacecraft rather than mythological creature.
Pueblo of Zuni, New Mexico
United States · Ancestral Puebloan
Theorists argue that Zuni kachina traditions, petroglyphs, and oral histories describe real extraterrestrial visitors — sky people who came down from the heavens and guided the tribe — and that kachina costumes and masks resemble modern space suits and helmets. Mainstream anthropologists and Zuni scholars interpret the kachinas as sacred supernatural beings central to Puebloan religion, with the costumes representing spiritual rather than physical entities.
Ur / Ancient Mesopotamia
Iraq · Sumerian
Sumerian texts describe the Anunnaki — gods who came from the sky and created humanity through genetic engineering
Zuni Petroglyph Sites, New Mexico
United States · Ancestral Puebloan
Theorists argue that petroglyphs near Zuni Pueblo depict extraterrestrial beings and their craft, and that the Zuni themselves refer to certain figures as 'spacemen.' Mainstream archaeologists interpret the rock art as ceremonial or cosmological imagery created by ancestral Puebloan peoples to record celestial events and spiritual beliefs.
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“The origins of the Han”