The Mystery of High-Tech Tool Marks in China’s Ancient Longyou Caves
The Longyou Caves are a series of large artificial sandstone caverns located at Phoenix Hill, close to the village of Shiyan Beicun by the Qu River, Lingyou County, in China’s Zhejiang Province. The caves were discovered by local “farmers who were pumping water out of five small pools on a rough-flat ground in 1992.” These ...