c. 1450
Communication
Andes
Inca road system and khipu
The Inca ran 40,000 km of roads with relay runners and recorded data in knotted cords.
Why it mattered
Administration of a continental empire without writing or the wheel.
Renaissance
1450
2 recorded milestones at this point in the record.
c. 1450
Agriculture
Amazonia
Terra preta and Amazonian soil engineering
Amazonian peoples enriched poor tropical soils with charcoal, bone and pottery.
Why it mattered
A durable, carbon-storing agriculture still fertile centuries later.
Sign in to amend this page or add a milestone — every edit is signed and kept in the record.
Nearby in the record
1405Exploration
Zheng He's treasure fleets
China
c. 1420Transportation
Caravel and Portuguese Atlantic navigation
Portugal
c. 1440Communication
Printing press with movable metal type
Germany
1443Communication
Hangul alphabet
Korea
1492Exploration
Transatlantic contact
Atlantic
1494Society
Double-entry bookkeeping
Italy