Used with
permission of Maiken Naylor, University at Buffalo, Buffalo, NY, USA,
http://ublib.buffalo.edu/libraries/units/sel/exhibits/stamps
William A Fowler (1911-1995) shared the 1993 Nobel physics prize with Chandrasekhar for important astrophysical discoveries in his theoretical and experimental studies of nuclear reactions in the formation of the chemical elements in the universe, from the mostly hydrogen and helium created in the Big Bang. The chart of nuclides on the stamp shows stable heavy nuclei between hafnium and lead.