Science20th century (1949)United Stateshigh confidence

Willard Libby's radiocarbon dates matched the verified ages of the objects he tested, launching the radiocarbon-dating revolution.

Notes on verification

Confirmed by multiple independent sources (Linda Hall Library, Texas Beyond History, ACS) describing Libby's 1949 test results matching known-age samples and validating radiocarbon dating, sparking the 'radiocarbon revolution.' Minor later discrepancies with dendrochronology noted but don't undermine the original claim. [tier=gold indep_score=0.867 clusters=3 claim_tier=notable]

Sources