Willem Hendrik Keesom

Willem 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). Template:Scientist-stubde:Willem Hendrik Keesom nl:Willem Hendrik Keesom

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