We're in Dublin discussing Ireland's only science Nobel Prize winner, Ernest Walton, known as ETS to his colleagues. One of those colleagues, Iggy McGovern, penned a poem about Walton called Hammer and Spark. Video also features Sixty Symbols regular (and Irishman) Professor Phil Moriarty. Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/#!/periodicvideos Sixty Symbols videos by Brady Haran