Birthdate: September 26, 1849

Sun Sign: Libra

Birthplace: Ryazan, Russia

Died: February 27, 1936

Russian physiologist Ivan Pavlov is best remembered for his research in classical conditioning. He became the first Russian Nobel laureate after winning the 1904 Nobel Prize for Physiology or Medicine for his study of the physiology of digestion. His experiment on conditioned reflex using dogs is still studied in colleges.