Zhang Heng’s Ancient Earthquake Detector

This man built an earthquake detector in the year 132 AD! Zhang Heng was

a 2nd-century Chinese genius who was a polymath, mathematician, astronomer,

and inventor. He looked at the chaos of the Han Dynasty and invented the world’s first

working seismoscope a massive bronze vessel with dragons and frogs that could detect the direction

of an earthquake hundreds of miles away! No one believed it until it successfully

predicted a massive quake near Gansu! But that's not all! He also calculated pi more accurately

than his contemporaries and invented a hydraulic-powered armillary sphere that was the most complex celestial

globe in the world! He engineered the future 1,500 years before the Renaissance!