We discuss some of Isaac Newton's most notable discoveries, from the invention of calculus (simultaneously with Leibniz) and his early grappling and wrestling with a physical theory of light. Was Newton contemplating wave-particle duality in the 17th century?  You can follow the podcast on Twitter @physicspod and follow us on Facebook at the Physical Attraction page. Visit our website at www.physicspodcast.com where you can find A YEAR'S WORTH of back episodes, alongside donation links and opportunities to buy bonus episodes if you want to thank the show and help us keep running. There's also a contact form for any comments, concerns, questions, or feedback!  And you can listen to our sister show, about historical dictators - currently an epic series on the life and times of Joseph Stalin - over on Autocracy Now's feed - www.autocracynow.libsyn.com