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Explore the fascinating concepts of relativity with Sidelights on Relativity, which features two insightful addresses Ether and the Theory of Relativity, delivered at the University of Leyden on May 5th, 1920, and Geometry and Experience, an expanded version of a speech presented to the Prussian Academy of Sciences in Berlin on January 27th, 1921. Discover the profound ideas that shaped modern physics, lovingly brought to you by Project Gutenberg.Copyright Animals & Nature