Encyclopedia > Carbon-14

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Carbon-14 is the radioactive isotope of carbon discovered February 27th, 1940 by Martin Kamen and Sam Ruben[?]. Its presence in organic materials is utililised in radiocarbon dating.

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Richard I of England

... sons of Henry II, Richard had limited respect for his father and lacked foresight and a sense of responsibility. In 1173 he joined his brothers, Henry the Young King, ...