英国圣安德鲁斯大学的研究人员创造了迄今为止转速最快的人造物体。它们在实验中成功地让一颗微型球体悬空,并达到每分钟6亿次的转速。这一转速相当于普通家用洗衣机转速的50万倍以上,比牙科用钻头的转速还要快大约1 000倍。为了进行这项实验,他们使用碳酸钙制作了一个微型球体,直径仅有4微米(400万分之一 Researchers at St Andrews University in the UK have created the fastest man-made object by far. In experiments, they succeeded in making a microsphere float to 600 million revolutions per minute. This speed is equivalent to more than 500,000 times the speed of an ordinary household washing machine, about 1 000 times faster than a dental drill. For this experiment, they used calcium carbonate to make a microsphere with a diameter of only 4 microns (one in 4 million