The corpus, every claim citable.

Aryabhatiya I.3 gives the cosmic-cycle structure: 14 Manus × 72 yugas × 4,320,000 years = 4,354,560,000 years per kalpa (~4.35 billion). Modern radiometric Earth age (Patterson 1956): 4.54 billion. ~5% match between a 6th-century Sanskrit recurrence period and 20th-century radioactive-decay measurement. Almost certainly coincidence — Aryabhata was computing planetary cycles, not Earth's age — but striking.

The Aryabhatiya of Aryabhata · tr. W. E. Clark, 1930