WTF Fun Fact – Ice Road To The Forbidden City

Workers constructing Beijing’s Forbidden City created an ice path to carry stones to the site. The path was lubricated with water as the sledges with the stones passed, reducing friction and letting them slide much easier before the water refroze. WTF Fun Facts

Source: https://news.nationalgeographic.com/news/2013/10/131104-china-ice-road-forbidden-city-culture-science/

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