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Einstein (1879-1955)
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Einstein (1879-1955) revolutionized Newtonian mechanics by introducing his theory of general relativity in 1916.
This theory challenges the notions of space and time and thus challenges the principles of classical mechanics by postulating that:
- there is no absolute time
- there is no Galilean reference frame (stationary reference or rectilinear uniform motion relative to each other in which the fundamental laws of mechanics apply in the same way);
- gravitation is transmitted at the speed of light and not instantly through forces. 

This is a revolution, but it is confirmed by observation, in particular, it explains the excess of advance of the perihelion of Mercury.