Last week the sullen heralds of total war chattered in British skies, but many a British scientist, true to a long and stanch tradition, went calmly on with his researches in "pure" or fundamental science.* One of the purest of pure sciences is the approach to absolute zero, the nadir of cold. Absolute zero is the point at which all random motions of material particles, due to heat energy, are completely stilled. It is calculated at 273.13° below zero on the centigrade scale, and it can be written as simply 0°K., meaning zero on the Kelvin or absolute scale....
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