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The science room at Museo Galileo, where Paolo Galluzzi is the director, in Florence, Italy, Nov. 19, 2018. Even though Galluzzi, 76, has considerable hands-on experience tinkering with Leonardo and Galileo?s manifold machines and instruments, one of his greatest achievements has been to cement their presence online. (Clara Vannucci/The New York Times/Fotoarena)
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