is the only figure in the physical sciences with a stature that can be compared with . Newton is reported to have said "If I have seen further than other men, it is because I stood on the shoulders of giants." This remark is even more true of Einstein who stood on the shoulders of Newton. Both Newton and Einstein put forward a theory ofand a theory ofbut Einstein was able to baseon thethat had been constructed bywhile Newton had to developIt is therefore appropriate to acclaim Newton as the greatest figure inand theis his greatest achievement.

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