American physicist known for his 1962 controversial book The Structure of Scientific Revolution in which he introduced the term "paradigm shift".
Thomas Kuhn was born on 18 July, 1922
Today's Events: 20 April
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Apollo 16 lands on the moon
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First human organ replacement
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Vitaphone process – add sound to film – announced
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Radium chloride refined by Marie and Pierre Curie
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Secchi disk demonstrated
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Theory of spontaneous generation proven false
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Rare Sun Dog phenomenon observed in Stockholm
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David Filo Birthday
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Slavoljub Eduard Penkala Birthday
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Fred Fish Death Anniversary
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Kathleen Antonelli Death Anniversary
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Rudolph Dirks Death Anniversary
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Giuseppe Peano Death Anniversary
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Karl Ferdinand Braun Death Anniversary
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Bram Stoker Death Anniversary
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Chauncey Jerome Death Anniversary