Specifically for Mike Chase, black holes were predicted as far back as 1785, so Dodgson was not working in a total vacuum. Very readable site, and short. http://www.krioma.net/pdf/Einstein%20Rosen%20Bridge.pdf ------------------------------------------------------------------ To change your Lit-Ideas settings (subscribe/unsub, vacation on/off, digest on/off), visit www.andreas.com/faq-lit-ideas.html