The Multiversans are at the gates! Remember the 2008 annual conference "Strings 2008" at Geneva, when the organizers excluded all "anthropic string landscape" and "multiverse" talks from being presented? And the November 2008 workshop at Princeton (Steinhardt, Arkani-Hamed, Banks...) that pretty much concluded the landscape fad (2003-2007?) was finished? http://www.math.columbia.edu/~woit/wordpress/?p=1285 Try to stop Multiverse at a professional academic level and it just flows around you into the gullible public media--maybe it is just too tempting a way to sell books! Hawking's book "The Grand Design" is #1 seller today among all Amazon books. It goes on sale 7 September. https://www.amazon.com/Grand-Design-Stephen-Hawking/dp/0553805371 Brian Greene's new title is scheduled to appear in January 2011 "The Hidden Reality--Parallel Universes and the Deep Laws of the Cosmos" https://www.amazon.com/Hidden-Reality-Parallel-Universes-Cosmos/dp/0307265633/ So maybe we should talk about Multiverse thinking. What is it grounded in? Is there a basic scientific motivation for it?