The priest-astronomer caste of the Dogon people, located in present-day Mali in a mountain area about two hundred miles south of Timbuktu, report that they have been observing cosmos-related activity since approximately 1283 C.E. The observations of this secret society include the most important object in the sky for them, what modern astronomers call Sirius B, usually nearly invisible to the naked eye and located in the solar system of the bright star Sirius A. The Dogon astronomical celebrations occur every fifty to sixty years, when this star they describe as small and dense, and which they liken to a seed, orbits in the Sirius solar system in such a way as to be visible. In the 1930s the Dogon priests claimed to possess a more-than-440-year-old object that showed the orbit of Sirius B and a third star. Some Western astronomers...