Dogon Sirius Knowledge
The claim that the Dogon people of Mali held ancient knowledge of the invisible companion star Sirius B, popularized as evidence of contact with amphibious extraterrestrials.
The Dogon are a people of Mali with a rich cosmological tradition, including the Sigui ceremony held roughly every sixty years. French anthropologists Marcel Griaule and Germaine Dieterlen, who worked among the Dogon from the 1930s through the 1950s, reported that Dogon esoteric lore described Sirius as having a small, extremely dense, invisible companion star with a roughly fifty-year orbit — features that resemble the real white dwarf Sirius B. Their accounts also describe amphibious beings called the Nommo associated with the star system.
In 1976 Robert K. G. Temple’s book The Sirius Mystery argued that this knowledge was too accurate to be coincidental and proposed that the Dogon inherited it from amphibious extraterrestrial visitors. Ancient Aliens and the ancient-astronaut hypothesis frequently cite the Dogon as a flagship case of preserved alien astronomy.
The leading skeptical explanation is cultural contamination. Carl Sagan and science writer Ian Ridpath argued that the Sirius details most likely reached the Dogon from Western visitors and were then woven into existing mythology — a French astronomical expedition observed a solar eclipse in Dogon territory in 1893, and by the 1920s–30s knowledge of Sirius B was current in popular European astronomy. The case was further undermined by Dutch anthropologist Walter van Beek, who lived among the Dogon for years and could not reproduce Griaule and Dieterlen’s Sirius findings, suggesting the lore may partly reflect the expectations of the original investigators.