Ancient Technology: The Timekeeping Stone That Rings at Set Intervals
During the Wanli era of the Ming Dynasty (1573-1620), in Guixi (now Guixi City, Jiangxi Province), a villager was plowing his field when he discovered the remains of an ancient city wall. Out of curiosity, the man started digging. As he dug further, he finally uncovered a beautifully colored stone. He decided to bring the ...