Chinese-US physicist Chien-Shiung Wu and colleagues, in their laboratory at Columbia University, New York, USA, in 1963. At left is Chinese-US physici

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Chinese-US physicist Chien-Shiung Wu and colleagues, in their laboratory at Columbia University, New York, USA, in 1963. At left is Chinese-US physicist Chien-Shiung Wu (1912-1997) with her colleagues Y. K. Lee, and L. W. Mo. They had successfully carried out a particle physics experiment to confirm the theory of conservation of vector current. Over several months, proton beams from a Van de Graaff accelerator were transmitted through pipes to strike a 2-millimetre boron target at the entrance to a spectrometer chamber. Born in China, Wu moved to the USA in 1936, becoming a physics professor at Columbia University, New York, in 1957. Wu and her colleagues experimentally confirmed several particle theories, including work that led to others receiving the 1957 Nobel Prize. Wu was awarded the 1978 Wolf Prize in Physics for her work. Photographed on 20 March 1963 by Margarete Beutler (1876-1949).

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Photo credit: © SMITHSONIAN INSTITUTION/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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