Physicists develop model that pushes limits of quantum theory, relativity

All of the matter in the universe -- everything we see, feel and smell -- has a certain predictable structure, thanks to the tiny electrons spinning around their atomic nuclei in a series of concentric shells or atomic levels. A fundamental tenet of this orderly structure is that no two electrons can occupy the same atomic level (quantum state) at the same time -a principle called the Pauli exclusion principle, which is based on Albert Einstein's theory of relativity and quantum theory.

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