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Experimental physicist Chien-Shiung Wu disproved a fundamental law of nature.

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Chien-Shiung Wu

Nuclear physicist Chien-Shiung Wu worked on the Manhattan Project developing a separation process for uranium.

She also disproved a fundamental law regarding parity, demonstrating that decaying cobalt nuclei ejected electrons asymmetrically, a result contrary to what the law predicted. (Photo: Wiki Commons)

(Courtesy of Wiki Commons)