The New York Times is running an article today on multiverse theories

It mostly describes the controversies over the anthropic principle and
how the AP works a little better in the context of multiverse theories.
The big issue is whether the "theory of everything" - string theory or
whatever - will fully specify the universe, or whether it will just
describe a family of universes where the AP must then be invoked to
explain why we live in the one we do.

There is also a related, brief article at about
how different theories lead to multiple universes.  However neither
article goes so far as to seriously discuss the all-universe model.

The first article also has a link to a really nice animation showing
an inflation-style multiverse model.

Hal Finney

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