![Oswald Avery Oswald Avery](http://www.thefamouspeople.com/profiles/thumbs/oswald-avery-16433-1.jpg)
A pioneer of molecular biology, Oswald Avery revolutionized science with his research on the chemical processes involved in immunology. The Canadian-American bacteriologist initially aspired to be a musician. He later proved that DNA was the basis of heredity. Though nominated for the Nobel Prize multiple times, he never won it.