Graham Farmelois a By-Fellow at Churchill College, Cambridge, and an Adjunct Professor of Physics at Northeastern University, Boston, USA. He edited the bestselling It Must be Beautiful: Great Equations of Modern Science in 2002. His biography of Paul Dirac, The Strangest Man, won the 2009 Costa Biography Award and the 2010 Los Angeles Times Science Book Prize. To find out more go to www.grahamfar...