Karl Ernst Claus (also Karl Klaus or Carl Claus, Russian: Карл Ка́рлович Кла́ус, 23 January 1796 – 24 March 1864) was a Livonian chemist and naturalist. Claus was professor at Kazan State University and a member of the Russian Academy of Sciences. He was primarily known as a chemist and discoverer of the chemical element ruthenium, but also as one of the first scientists who applied quantitative methods in botany.
Read more about Karl Ernst Claus: Early Life and Education, Botany, Chemistry, Ruthenium, Health and Late Years
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