Events
1921 - Researchers at the University of Toronto led by biochemist Frederick Banting announce the discovery of the hormone insulin.
Births
1733 - Jeremiah Dixon, English surveyor and astronomer
1833 - Thomas George Bonney, English geologist
1848 - Loránd Eötvös, Hungarian physicist
1881 - Hans Fischer, German chemist, Nobel laureate
Deaths
1844 - John Dalton, English physicist and chemist
1917 - Emil Theodor Kocher, Swiss surgeon, Nobel laureate
1931 - Auguste-Henri Forel, Swiss entomologist
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