Isaac Newton

Isaac Newton (1642-1727) was an English physicist and mathematician. One of his most famous accomplishments was formulating the theory of gravity. fourth doctor|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)

In the Big Finish Production Circular Time story Summer The fifth doctor and Nyssa arrested for forgery and Isaac Newton draws a series of interesting conclusions from a series of well worn coins that the Doctor accidentally passes.