The Seven Sisters
Greek, Aboriginal Australian, Japanese and Nordic traditions independently tell versions of the same 'lost sister' story. Two astronomers proposed in 2021 that this widespread detail might preserve a real change in the cluster's visible stars roughly 100,000 years ago — an extraordinary claim of oral memory that rests on a striking coincidence, not proof.
Ray Norris & Barnaby Norris's 2021 stellar proper-motion hypothesis
A star cluster known across unconnected cultures worldwide as seven sisters, often with a story explaining why only six are now visible.
