Aleksandr Onufriyevich Kovalevsky

Aleksandr Onufriyevich Kovalevsky (born Nov. 7 [Nov. 19, New Style], 1840, Shustyanka, near Dvinsk, Russia—died Nov. 9 [Nov. 22], 1901, St. Petersburg) was a Russian founder of comparative embryology and experimental histology, who established for the first time the existence of a common pattern in the embryological development of all multicellular animals. Kovalevsky received a doctor of science degree from the University of St. Petersburg (1867) and taught there (1867, 1891–93) and at the universities...