HistoryAncient (c. 100 BCE)Greecehigh confidence

A nondescript lump recovered from the Antikythera wreck turned out to be a complex assembly of interlocking gears and plates, but missing parts mean the mechanism's full function remains unknown.

Notes on verification

Well-documented by decades of scholarship, imaging studies, and the Antikythera Mechanism Research Project; widely corroborated across academic and museum sources. [tier=silver indep_score=0.875 clusters=2 claim_tier=notable]

Sources