The Dogon and Sirius: Unpacking a Famous Mystery

The brightest star in the night sky is Sirius. In 1862, astronomers first saw a faint companion star orbiting it, now called Sirius B, a tiny, incredibly dense white dwarf invisible to the naked eye. Then, in the mid-20th century, two French anthropologists reported something astonishing: the Dogon people of Mali seemed to know about this invisible star, its density and its orbit. Since then, the "Dogon mystery" has appeared in countless books, documentaries and websites. Some even claim the knowledge came from aliens. What is the truth?

Who are the Dogon?

The Dogon live on and around the Bandiagara Escarpment in central Mali, a dramatic cliff landscape we described in our story on Dogon country. They are known for their architecture, masks, sculpture and complex religious traditions, including the Sigui ceremony, held roughly every 60 years.

Griaule and Dieterlen's report

The French anthropologist Marcel Griaule worked among the Dogon from the 1930s until his death in 1956, often with his colleague Germaine Dieterlen. In 1950, they published an article titled "A Sudanese Sirius System". They wrote that Dogon religious experts had told them about a star called po tolo, a companion of Sirius, which was:

• invisible to the eye,
• extremely small and extremely heavy,
• and took about 50 years to orbit Sirius.

These claims matched what astronomers knew about Sirius B: its orbit is indeed about 50 years, and it is extraordinarily dense. Griaule and Dieterlen also reported Dogon ideas about other stars, planets and the origins of the universe.

Griaule's later book, Conversations with Ogotemmêli (1948), based on talks with a Dogon elder, presented Dogon thought as a sophisticated philosophy and cosmology, challenging European prejudices about African "primitive" beliefs.

The Sirius Mystery

In 1976, the American writer Robert Temple published The Sirius Mystery, arguing that the Dogon knowledge could only have come from intelligent beings from the Sirius star system, which Dogon myth calls the Nommo, amphibious ancestral beings. The book became a bestseller and inspired many later "ancient astronaut" theories.

Questions and criticisms

Scientists and anthropologists raised serious doubts:

• Contamination. The astronomer Carl Sagan and others pointed out that Sirius B had been discovered by Western astronomers in the 19th century, and widely discussed in the early 20th century, when its extraordinary density made news. French colonial officials, teachers, missionaries and travellers were present in Mali, and Dogon people could have heard about it before Griaule's research. Astronomy was also taught in some colonial schools.
• Interpretation. Some scholars argued that Griaule's findings reflected his own interpretations and questions, rather than Dogon ideas as they were generally understood. The Dogon descriptions he recorded could be read in many ways.
• Errors. Some of the details Griaule and Dieterlen reported, such as a third star in the Sirius system, have not been confirmed by astronomers.

Dogon restudied

The most important challenge came from the Dutch anthropologist Walter van Beek. In the 1980s, he and his team spent years among the Dogon, interviewing many people, including religious experts. In 1991, they published "Dogon Restudied" in the journal Current Anthropology.

Van Beek reported that none of the Dogon he spoke to knew of a companion star to Sirius, or of the detailed astronomical knowledge Griaule had described. He suggested that Griaule's methods, working closely with a small number of informants, asking leading questions and constructing a grand system from fragments, may have produced a picture that owed much to Griaule himself. Some of Griaule's informants may have tried to give him the answers he seemed to want.

Van Beek did not accuse Griaule of fraud. He argued that the result was a collaborative creation, shaped by the anthropologist's expectations as well as by Dogon knowledge. Other scholars have defended aspects of Griaule's work, and the debate continues.

What does this mean?

The most widely accepted conclusion today is that the claim that the Dogon possessed detailed, ancient knowledge of Sirius B is not supported by the evidence. There is no need for aliens to explain it: either the knowledge came through contact with Europeans, or it was largely a product of Griaule's interpretations.

But this does not mean Dogon culture is any less rich. The Dogon have a sophisticated cosmology, a calendar of rituals, deep knowledge of their environment and an extraordinary artistic tradition. The danger of the Sirius story is that it treats African knowledge as interesting only if it can be explained by outside forces, whether French anthropologists or extraterrestrials.

Lessons for anthropology

The Dogon debate has become a classic case study in anthropology. It raises important questions:

• How do researchers' expectations shape what they find?
• Whose voices are recorded, and whose are left out?
• How do stories about Africa travel, and get distorted, in popular culture?

Why it matters

The Dogon and Sirius story is a reminder to think critically, especially about extraordinary claims. It shows how a fascinating idea can spread far beyond the evidence, and how careful fieldwork can test it. Above all, it reminds us to respect African cultures for what they are, rather than for the myths others have built around them.

Further reading

• Marcel Griaule and Germaine Dieterlen, "Un système soudanais de Sirius," Journal de la Société des Africanistes 20 (1950)
• Walter E.A. van Beek, "Dogon Restudied: A Field Evaluation of the Work of Marcel Griaule," Current Anthropology 32, no. 2 (1991)
• Carl Sagan, Broca's Brain (Random House, 1979)