Jeremy Bernstein is a professor emeritus of physics@the Stevens Institute of Technology in New Jersey. He was a staff writer for the New Yorker from 1961 to 1995. Bernstein has held appointments@the Institute for Advanced Study, Brookhaven National Laboratory, European Organization for Nuclear Research (CERN), Oxford University, the University of Islamabad and the École Polytechnique. He has written scores of technical papers, several technical monographs and 14 books on popular science and mountain travel. His latest book is Quantum Leaps (Harvard University Press, 2009) Address: 2 Fifth Ave, 18-L, New York, NY 10011. E-mail: jbernste@earthlink.net