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Cheming gum was patented by a dentist! William Semple patented his early rubbery gum in 1869.
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4th February
On this day in 1936,
The radioactive substance, Radium E, was produced synthetically...
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On this day in 1961,
The Soviet Union launched the Sputnik 7 space probe, hoping to reach Venus...
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On this day in 1971,
The Rolls-Royce manufacturing company became bankrupt, and was forced into receivership...
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