Dogon / Sirius-B Nommo Tradition.

The Dogon/Sirius-B tradition concerns claims, popularized by Robert Temple's 1976 book 'The Sirius Mystery,' that the Dogon people of Mali preserved ancient knowledge of the invisible companion star Sirius B and of amphibious 'Nommo' visitors from the Sirius system. It matters as a flagship ancient-astronaut argument; anthropologist Walter van Beek's later fieldwork failed to confirm the detailed star-lore, and scholars attribute any such knowledge to 20th-century contact with Western informants rather than prehistoric alien visitors.