Walter van Beek, an
anthropologist studying the Dogon, found no evidence that they had any historical advanced knowledge of Sirius. Van Beek postulated that Griaule engaged in such leading and forceful questioning of his Dogon sources that new myths were created in the process by
confabulation, writing that:
Carl Sagan has noted that the first reported association of the Dogon with the knowledge of Sirius as a
binary star was in the 1940s, giving the Dogon ample opportunity to gain cosmological knowledge about Sirius and the Solar System from more scientifically advanced, terrestrial societies whom they had come in contact with. It has also been pointed out that binary star systems like Sirius are theorized to have a very narrow or non-existent
Habitable zone, and thus a high improbability of containing a planet capable of sustaining life (particularly life as dependent on water as the Nommos were reported to be). Daughter and colleague of Marcel Griaule, Geneviève Calame-Griaule, defended the project, dismissing Van Beek's criticism as misguided speculation rooted in an apparent ignorance of esoteric tradition. Van Beek continues to maintain that Griaule was wrong and cites other anthropologists who also reject his work. The assertion that the Dogon knew of another star in the Sirius system, Emme Ya, or "larger than Sirius B but lighter and dim in magnitude" continues to be discussed. In 1995, gravitational studies indicated the possible existence of a
red dwarf star circling around Sirius but further observations have failed to confirm this. Space journalist and sceptic
James Oberg collected claims that have appeared concerning Dogon mythology in his 1982 book and concedes that such assumptions of recent acquisition are "entirely circumstantial" and have no foundation in documented evidence and concludes that it seems likely that the Sirius mystery will remain exactly what its title implies: a mystery. Earlier, other critics such as the astronomer Peter Pesch and his collaborator Roland Pesch and Ian Ridpath had attributed the supposed "advanced" astronomical knowledge of the Dogon to a mixture of over-interpretation by commentators and cultural contamination. ==References in fiction==