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Willem Hendrik KeesomWillem Hendrik Keesom (1876-1956) was a Dutch scientist who, in 1926, invented a method to solidify helium. He was previously a student of Heike Kamerlingh Onnes, who had been the first to liquify helium (a feat for which Kamerlingh Onnes received a Nobel Prize). Keesom, Willem Hendrik Keesom, Willem Hendrik Keesom, Willem Hendrik Keesom, Willem Hendrik
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