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Einstein's Lost Key: How We Overlooked the Best Idea of the 20th Century

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Updated edition 2022!
One hundred years after the completion of the General Theory of Relativity, conferences, meetings, and celebrations are taking place all around the world.Yet a decisive consideration on the subject by Albert Einstein has completely fallen into oblivion. Already in 1911, he held the key to an even greater discovery in his hands: a theory concerning the variable speed of light that would have explained the origin of gravity by referring to distant masses in the universe. ...