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…showed last 75 words of 583 total…motion only relative motion. Consequently replacing Isaac Newton's 200-year-old theory of mechanics. 'Einstein showed that we do not reside in the flat, Euclidean space and uniform, absolute time of everyday life, but in another environment; curved-space time.' The theory played a part in advances in physics. It led to the nuclear era, with potential for benefit as well as devastation, and made possible an understanding of the microworld of elementary particles and their interactions.