How old would Martin Karplus be today?

Martin Karplus was an Austrian and American theoretical chemist. He was the Theodore William Richards Professor of Chemistry at Harvard University. He was also the director of the Biophysical Chemistry Laboratory, a joint laboratory between the French National Center for Scientific Research and the University of Strasbourg, France. Karplus received the 2013 Nobel Prize in Chemistry, together with Michael Levitt and Arieh Warshel, for "the development of multiscale models for complex chemical systems".