The First Seismograph – Ancient China’s Earthquake Detector
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The First Seismograph – Ancient China’s Earthquake Detector
In 132 AD, Chinese inventor Zhang Heng created the world’s first earthquake detector — a bronze device that could sense distant quakes before they were felt. Using dragons, frogs, and physics, this ancient tool pointed to the quake’s direction… centuries before modern sensors. And scientists still don’t fully understand how it worked ...
1.3K views10 months ago
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