French naturalist and zoologist Georges Cuvier (full name Baron Georges Léopold Chrétien Frédéric Dagobert Cuvier) died on this day in 1832.
Cuvier was instrumental in establishing the fields of comparative anatomy and paleontology by comparing living animals with fossils. He is well known for establishing that extinction was a fact.
His last words, to a nurse who was bleeding him on his deathbed (he died of cholera):
"Nurse, It was I who discovered leeches have red blood."