Unsubstantiated
Bessel predicts an unseen companion to Sirius
Astronomer Friedrich Bessel deduces from a wobble in Sirius's proper motion that it has an invisible companion, decades before any Dogon-Sirius claim and long before Griaule's fieldwork.
The Dogon and Sirius B: Did Amphibious Aliens Teach an African Tribe About an Invisible Star? →