While wearing a toilet seat on his head, David Hu accepts the Physics Prize, for his research on the principle that mammals empty their bladders of urine in about 21 seconds, from Dudley Herschbach, right, the 1986 Nobel Laureate in Chemistry, while being honored during a performance at the Ig Nobel Prize ceremony at Harvard University, in Cambridge, Mass., on Thursday. Charles Krupa/AP hide caption

itoggle caption Charles Krupa/AP