1,800 years ago China had one of the most intriguing technologies. Now is the point of resuscitating the dragon that detects earthquakes

Almost two thousand years ago, during the Han dynastythe Chinese scholar ZHANG HENG He designed a device that, according to historical chronicles, could detect distant earthquakes and even point out his address. That invention, called HouFeng Didong Yiit was a mechanical gadget that had the dragon as the main actor. Now China is about to … Read more

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