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12月1日1980年12月1日,中科院古脊椎动物与古人类研究所和云南省博物馆联合组织的发掘队,在云南省禄丰县的石灰坝挖出了一个腊玛古猿头骨。这一发现证明了我国西南地区是人类起源的重要区域之一。12月9日1968年12月9日,美国斯坦福研究院的恩格雷贝特博士向公众展示了世界上第一只鼠标。它只是一只小木头盒子,由底部的小球带动枢轴转动,通过变阻器改变阻值来产生位移信号。
December 1, 1980 On December 1, 1980, an excavation team co-organized by the Institute of Vertebrate Paleontology and Palaeontology of the Chinese Academy of Sciences and the Yunnan Provincial Museum dug up a Macaque Skull of Lima in limestone dam of Lufeng County, Yunnan Province. This finding proves that southwestern China is one of the most important areas of human origin. December 9, 1968 On December 9, 1968, Dr. Enggrave of the Stanford Institute in the United States showed the world’s first mouse to the public. It is just a small wooden box, driven by the bottom of the ball pivot, through the rheostat to change the resistance to generate a displacement signal.