On 11 December, Margaret Tuchman wrote about the article on PD appearing in the new, Jan. '97 issue of Scientific American. Today I accessed the Sci. Amer. Web page per her instructions and was easily able to review the Jan. issue. However, the referenced PD article did not seem to be there. Am I mistaken? Is the article there in the Jan. issue? Just curious. Milton McLain [log in to unmask]