Did you know ancient China invented the world’s first earthquake detector… using DRAGONS and FROGS? 🐉🐸br br In this stunning 3D animated short, we reveal the genius behind Zhang Heng’s seismoscope — a device that could detect earthquakes from hundreds of miles away… without electricity or modern tech!br br You’ll see:br ✅ How bronze balls rolled into frog mouths to pinpoint quake directionbr ✅ The hidden physics behind the suspended pendulumbr ✅ Why this invention was revolutionary for its timebr br Perfect for history buffs, science lovers, and fans of educational animation — this is history brought to life with cinematic visuals and mind-blowing facts.