Sir Isaac Newton was a mathematician and physicist born in Lincolnshire, England. In the world of mathematics, he is known best for his contributions to calculus, particularly the idea that differentiation and integration are inverses of each other. He wrote the

*Mathematical Principals of Natural Philosophy*in 1687, a highly respected book of his day. In it, he wrote about his laws of motion and gravitation.**Sources:**

Hall, A. (n.d.). Isaac Newton's Life.

*Isaac Newton's Life*. Retrieved June 16, 2014, from https://www.newton.ac.uk/newtlife.html

Newton's 3 (three) Laws of Motion. (2013, April 13).

*YouTube*. Retrieved June 16, 2014, from http://www.youtube.com/watch?v=mn34mnnDnKU

Sir Isaac Newton. (2014). The Biography.com website. Retrieved 05:40, Jun 16, 2014, fromhttp://www.biography.com/people/isaac-newton-9422656