In this episode, we get into the heart of Isaac Newton's scientific contribution. His laws of mechanics and gravitation fundamentally changed the way that we viewed both motion, and one of the (now four) fundamental forces. They would become the theory that dominated our understanding for the next three centuries, and even when relativity is discovered, Newton's laws are accurate enough across a wide enough range of circumstances to allow us to put humans on the Moon.  We'll dive into these laws, explain them, and discuss how they govern so many phenomena in the world around us - from snooker to the cosmos.  You can subscribe to the show on iTunes or where-ever you get your podcasts, and visit our website at www.physicspodcast.com where you'll find a contact form to get in touch with the show, and donate buttons if you want to help the show out. Also listen to our sibling podcast www.autocracynow.libsyn.com - Autocracy Now, about the lives of famous dictators: currently, Stalin.