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Light, stopped. Inside the atoms.
She slowed light to the speed of city traffic. Then she stopped it inside the atoms. In 1999, physicist Lene Hau cooled sodium atoms to a billionth of a degree above absolute zero — colder than the depths of space — and dropped a pulse of light to 17 m/s. Two years later, she stopped a pulse mid-flight inside the cloud, held it for a ...
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