"On the Shoulders of Giants" tells a compelling story, using original papers from Einstein, Copernicus, Galilei, Kepler and Newton. Theoretical physicist Stephen Hawking explains how these works changed the course of science, ushering astronomy and physics out of the Middle Ages and into the modern world.
One always feels the pressure upon his shoulders when he prevents the motion of a load resting upon him; but if one descends just as rapidly as the load would fall how can it gravitate or press upon him? Do you not see that this would be the same as trying to strike a man with a lance when he is running away from you with a speed which is equal to, or even greater than, that with which you are following him? You must therefore conclude that, during free and natural fall, the small stone does not press upon the larger and consequently does not increase its weight as it does when at rest. (查看原文)
![[英] 史蒂芬·霍金](https://img1.doubanio.com/view/celebrity/m/public/p15289.jpg)
史蒂芬·霍金 作者
还没人写过短评呢