For all his accomplishments, Einstein never lived to see his fondest dream come true. Our century's best-known physicist spent most of his life searching for a comprehensive set of laws that would explain the behavior of nature on all levels, from quasar to quark. He had, in his twenties, already shown that space and time were intertwined. He then succeeded in showing how gravity is intimately related to the geometry of this curved space-time. But he failed when he tried to weave ...
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