Essentially, in the models favored by the BICEP2 teams observations, the process that inflates a universe looks just too potent to happen only once; rather, once a Big Bang starts, the process would happen repeatedly and in multiple ways. A multiverse offers one good possible explanation for a lot of the unique observations we have made about our universe, says MIT physicist Alan Guth, who first wrote about inflation theory in 1980. Life being here, for example. If ours was the only cosmos spawned by a Big Bang, these life-friendly properties would seem impossibly unlikely. But in a multiverse containing zillions of universes, a small number of life-friendly ones would arise by chance—and we could just happen to reside in one of them. Life may have formed in the small number of vacua where it was possible, in a multiverse, says Guth. Thats why we are seeing what we are seeing. Not because we are special, but because we can.
Posted on: Thu, 20 Mar 2014 06:20:38 +0000
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