A Pilgrim's History: Trains at the Speed of Light

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On September 26, 1905, Einstein published the third of his Annus Mirabilis papers, positing the theory of special relativity. This groundbreaking theory was the product of the hypothetical question posed by an active imagination: what would happen if Einstein and his mirror were traveling at almost the speed of light?
A Pilgrim's History: Trains at the Speed of Light
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