The Dogon people of the central plateau, Mali.
The Dogon worship ancestral spirits or deities called Nommos, who were described as amphibious, hermaphroditic, fish-like creatures. They breathed through holes on their back and had skin like that of a chameleon. The Nommos have been referred to by the Dogon as “The Monitors”, “Masters of the Water” and “The Teachers”.
Research completed by French anthropologists from 1931-1956, discovered (though not without controversy) from a village Elder named Ogotemmêli, that the Dogon understood knowledge of the Cosmos far beyond what could be expected.
Ogotemmêli told the French researchers that the Nommos came from a small planet which orbits a star, a sister star of Sirius. Ogotemmêli went on to explain that the sister star orbits Sirius every 50 years and has a huge mass.
The star, which scientists now know as Sirius B, completely invisible to the human eye, was only theorized in the 19th Century, and wasn’t photographed until 1970. According to Dogon tradition, it was the Nommos who provided them with the knowledge of Sirius B, along with the knowledge that Jupiter has 4 moons and Saturn has rings.
The Dogon have long practised ceremonies which celebrate the cycle of Sirius B around Sirius. They are believed to be of Egyptian decent, another culture with strong ties to the star Sirius.