Isaac Newton

Isaac Newton (1642-1727) was an English physicist and mathematician. One of his most famous accomplishments was formulating the theory of gravity. The Doctor once claimed that he sat in Newton's tree dropping apples onto his head, then explained gravity to him over dinner. (DW: The Pirate Planet). He is also known for his quote:


 * "For every action, there is an equal and opposite reaction."

This quote lead Romana to believe that Newton invented punting. (DW: The Five Doctors)