Your friend thought you should see this article on newscientist.com today. http://www.newscientist.com/article/ Some articles may require a login, available free to all subscribers to New Scientist magazine. You can subscribe at http://www.newscientist.com/subscribe. Their message: (psst...Carol -- I'd be interested in what your son knows/thinks about this) NewScientist.com is the world's leading online science and technology news service, with a global network of award-winning journalists. Visit www.newscientist.com now for constantly updated and authoritative reporting that's both fast and fascinating. ------------------------------------------------------------------ To change your Lit-Ideas settings (subscribe/unsub, vacation on/off, digest on/off), visit www.andreas.com/faq-lit-ideas.html