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Theory of relativity

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Do you really understand Einstein’s theory of relativity? - BBC News

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Einstein's General Theory of Relativity

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Dark Matter findings suggest Einstein’s Theory of Relativity “may be wrong” - BBC News

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Albert Einstein (General theory of relativity)

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Breakthrough Junior Challenge 2017 | Relativity & The Equivalence of Reference Frames

The theory of relativity usually encompasses two interrelated theories by Albert Einstein: special relativity and general relativity. Special relativity applies to elementary particles and their interactions, describing all their physical phenomena except gravity. General relativity explains the law of gravitation and its relation to other forces of nature. It applies to the cosmological and astrophysical realm, including astronomy.
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