c. 350 BCE
Science
Greece
Formal logic
Aristotle sets out the syllogism and the rules of valid inference.
Why it mattered
A portable method for testing arguments, used unchanged for two millennia.
Antiquity
350 BCE
2 recorded milestones at this point in the record.
350 BCE
Science
Greece
Aristotle's systematic biology
Dissection and classification of hundreds of species.
Why it mattered
Founded natural history as an empirical discipline.
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