Einstein's Quantum Riddle
Einstein called it "spooky action at a distance," but today quantum entanglement is poised to revolutionize technology from computers to cryptography.
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Physicists have gradually become convinced that the phenomenon—two subatomic particles that mirror changes in each other instantaneously over any distance—is real. But a few doubts remain. NOVA follows a ground-breaking experiment in the Canary Islands to use quasars at opposite ends of the universe to once and for all settle remaining questions.
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