Results of Muon Experiment Offer More Precision But No Added Clarity

The deviant behavior of a tiny particle called the muon might point to undiscovered forms of matter and energy in the universe. Or it might not.

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Trump Freeze on Aid to Nuclear Inspectors Undercuts His Iran Policy

The president’s halt of foreign aid upended two U.S. programs that help the International Atomic Energy Agency find clues about Iran’s drive to build atomic bombs.

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