The Disappearing Star and The Oldest Story Ever Told

TL;DR

Cultures worldwide describe seven Pleiades stars despite only six being visible, possibly because two stars were separable 100,000 years ago when humans still shared Africa.

Key Points

• 1.The Pleiades 'seven sisters' story appears across unconnected cultures. Greeks, Aboriginal Australians, Hindu epics, the Nez Perce, and Western Mono all independently tell stories about seven stars — despite ancestors separating at least 60,000 years ago.
• 2.Two Pleiades stars, Atlas and Pleione, were once far enough apart to see separately. Researchers used measured proper motions to calculate that ~100,000 years ago these two stars would have appeared as distinct objects to the naked eye, explaining the 'seventh sister.'
• 3.An astrophysicist verified the math, but significant caveats remain. Variable star brightness, Earth's orbital wobble and axial tilt over millennia, and tiny margins of error in proper motion calculations could all shift the result meaningfully.
• 4.The migration timeline is contested. The researchers cite humans leaving Africa 100,000 years ago, but scholarly consensus places the major migration at roughly 60,000 years ago — though the story could still have been preserved and carried forward.
• 5.Not all Pleiades stories are as similar as they first appear. Aboriginal Australian versions emphasize water and ritual; Māori call them Matariki (eyes of a god); Hawaiian tales involve a greedy nobleman and a mouse — casting doubt on a single shared origin story.