Ancient knife proves longer astronomical history www.chinaview.cn 2005-03-12 09:51:05 XINING, March 12 (Xinhuanet) -- Archaeologists in northwest China's Qinghai province claimed that a 5,000-year-old stone knife with designs of constellations will extend China's history of astronomical observation by 1,000 years. The finely-polished stone knife, six centimeters long and threecentimeters wide, was unearthed at the Laomao Ruins, a New Stone Age site nine kilometers west of Lamao Village in Qinghai. Archaeologists also unearthed many other relics from the site including pottery pieces, stone and bone tools. Liu Baoshan, head of the Qinghai Provincial Cultural Relics andArchaeology Research Institute, said seven holes...