The Inca road network: Qhapaq Ñan
Some 40,000 km of roads stitched a mountain empire together, run by relay runners — chasqui — carrying knotted quipu records instead of writing.
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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Spatial timeline — scroll horizontally
Edison lights the night
Edison's Menlo Park lab delivered a practical incandescent lamp, then the Pearl Street station (1882) to power it — light sold as a service.
The Wright Flyer leaves the ground
Orville and Wilbur Wright flew a powered, controlled, sustained heavier-than-air machine for twelve seconds at Kitty Hawk.
Chronology
The Inca road network: Qhapaq Ñan
Some 40,000 km of roads stitched a mountain empire together, run by relay runners — chasqui — carrying knotted quipu records instead of writing.
Edison lights the night
Edison's Menlo Park lab delivered a practical incandescent lamp, then the Pearl Street station (1882) to power it — light sold as a service.
The Wright Flyer leaves the ground
Orville and Wilbur Wright flew a powered, controlled, sustained heavier-than-air machine for twelve seconds at Kitty Hawk.