There's a very nice discussion by George Ellis et al on "multiverses" here:
http://de.arxiv.org/abs/astro-ph/0305292
i've put it on CosmoNews:
http://adjani.astro.uni.torun.pl:9673/zwicky/CosmoNews
pozd boud
On Fri, 29 Aug 2003, Andrzej Marecki wrote:
----- Forwarded message from physnews@aip.org -----
PHYSICS NEWS UPDATE The American Institute of Physics Bulletin of Physics News Number 651 August 28, 2003 by Phillip F. Schewe, Ben Stein, and James Riordon
THE BIG RIP: A NEW COSMIC DOOMSDAY scenario takes the present acceleration of the expansion of the universe to new extremes. Dartmouth physicist Robert Caldwell and his colleagues Marc Kamionkowski and Nevin Weinberg at Caltech have determined that if the supposed dark energy responsible for the acceleration is potent enough not only will the space between galaxies continue to increase but that the galaxies themselves will fly apart as will, at successive times stars, planets, and even atoms and nuclei. Since
...