Ancient Chinese engineering

2 cards. Each one is a 40-second story with a five-minute read behind it.

1. The Song Dynasty's secret to the world's first endless chain driveBefore modern motorcycles or industrial conveyors, a medieval Chinese polymath engineered a way to turn water power into complex motion. By depicting the first continuous, endless…
2. The 17th-century optical planetarium that projected a royalist night skyBefore modern technology allowed us to map the heavens, humans built physical models of the cosmos. One such device, created in 1699, didn't just show the stars—it used light and …

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