Euclid's Elements
Euclid organized Greek geometry into axioms, definitions and proven theorems — one of the most reprinted books in history.
Humanity
115 events across three thousand years — chosen to be multi-regional and honest about uncertainty. Follow a thread to trace one capability through time, or filter by region and kind.
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Chronology
Euclid's Elements
Euclid organized Greek geometry into axioms, definitions and proven theorems — one of the most reprinted books in history.
Al-Khwarizmi writes al-jabr
Al-Khwarizmi systematized solving equations in The Compendious Book on Calculation by Completion and Balancing, and popularized Hindu-Arabic numerals.