5. Ancient Chinese Seismograph
Invented by Zhang Heng in 132 CE, the ancient Chinese seismograph is a stunning example of early scientific ingenuity.
This device could detect earthquakes occurring hundreds of miles away, using an intricate system of levers and weighted balls that would drop to indicate the direction of seismic activity.
As Live Science explains, Zhang Heng’s invention reveals a sophisticated grasp of natural forces and early earthquake detection.
