Published in Physics and Society Newsletter, Volume 26, Issue 2, April 1, 1997.
Copyright © 1997 American Physical Society. 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/1997/april/rapr97.html#a3.