Timeline Civilisations Methodology Sources

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Jemdet Nasr Culture

DisputedLegendary

3,226 years

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possible and likely range disputed, traditional, or legendary point event

c. 300,000 BCE-presentmedium1 source

Homo sapiens baseline

A species-level reference line for anatomically modern humans, used as the broad ruler above culture-specific timelines.

Uses astronomical year numbering in the database: 300,000 BCE is stored as -299999.

A source-backed timeline of human societies, knowledge, conflict, creativity, and technology from deep prehistory to the present day.

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Dates are stored as astronomical years and presented as readable BCE/CE chronology.