Postprint version. Published in Physics and Society Newsletter, Volume 37, Issue 1, January 1, 2008, pages 8-11.
This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society. The following article appeared in Physics and Society Newsletter and may be found at http://www.aps.org/units/fps/newsletters/2008/january/article-hafemeister.html.