10. Seismographs: Earthquake Detection and Safety
In the 2nd century CE, Chinese polymath Zhang Heng invented one of the world’s first seismographs—a remarkable device that could detect distant earthquakes. This early innovation laid the foundation for modern seismic science, helping societies prepare for and respond to natural disasters. Today’s advanced earthquake sensors, monitoring networks, and emergency protocols all echo Zhang Heng’s pioneering approach, demonstrating the lasting impact of ancient Chinese ingenuity on public safety and disaster management.
