CORRECTS TO REFLECT THAT KIRSHNER IS NOT A NOBEL LAUREATE, ADDS HIS CURRENT TITLE - Harvard University Clowes Professor of Science Robert Kirshner, left, along with Nobel laureates Dudley Herschbach, center, and Rich Roberts, fire paper airplanes back at the audience during a performance at the Ig Nobel Prize ceremony at Harvard University, in Cambridge, Mass., Thursday, Sept. 20, 2012. The Ig Nobel prize is an award handed out by the Annals of Improbable Research magazine for silly sounding scientific discoveries that often have surprisingly practical applications.(AP Photo/Charles Krupa)