Marcus Chown is an award-winning writer and broadcaster. Formerly a radio astronomer at the California Institute of Technology in Pasadena, he is cosmology consultant for NEW SCIENTIST. His books include WHAT A WONDERFUL WORLD, QUANTUM THEORY CANNOT HURT YOU and WE NEED TO TALK ABOUT KELVIN, which was shortlisted for the 2010 Royal Society Book Prize. He is also the author of the app SOLAR SYSTEM FOR iPAD, which won THE BOOKSELLER Digital Innovation of the Year award. Marcus was a regular guest on the BBC4 comedy-science show, IT'S ONLY A THEORY, and Channel 4's SUNDAY BRUNCH. He has spoken at a variety of events, including the Cheltenham Literary Festival, Sydney Writers Festival, the National Theatre and Wilderness Festival. And he has also performed stand-up comedy at a variety of venues from an upturned inflatable cow on London's South Bank to a glass-bottomed boat in a shark tank at the Brighton Sealife Centre.