Karl Eduard von Eichwald known as Karl Eichwald (Russian: Эдуард Иванович Эйхвальд, Eduard Ivanovich Eykhvald; 4 July 1795, in Mitau, Duchy of Courland and Semigallia – 10 November 1876, in Saint Petersburg) was a Baltic German geologist, physician, and naturalist, who lived his whole life in the Russian Empire.
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