Electron Perfectly Round to One Part in a Million Billion, Experiment Finds

By Edwin Cartlidge of Nature magazine Now that's precision measurement: the electron is a perfect sphere, give or take barely one part in a million billion. The result comes from the latest in a long line of experiments to probe the shape of the fundamental particle that carries electrical charge. [More]

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Electron Perfectly Round to One Part in a Million Billion, Experiment Finds