Dudley Robert Herschbach (born June 18, 1932) is an American chemist at Harvard University. He won the 1986 Nobel Prize in Chemistry jointly with Yuan T. Lee and John C. Polanyi "for their contributions concerning the dynamics of chemical elementary processes."Herschbach and Lee specifically worked with molecular beams, performing so-called "crossed molecular beam" experiments that enabled a detailed molecular-level understanding of many elementary reaction processes.He won American Institute of Chemists Gold Medal in 2011.