I'm sure you've heard of Isaac Newton and maybe of some of his laws. Like, that thing about "equal and opposite reactions" and such. But what do his laws mean? And how do they help us understand the world around us? In this episode of Crash Course Physics, Shini talks to us about just that. *** Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Help PBSDS win a Webby Award by voting here: https://pv.webbyawards.com/2016/online-film-video/video-channels-a