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