Sean Carroll on Existence before the Big Bang

Listening to the Scientific American podcast, there is an interview with Sean M. Carroll about his new book about time.

One interesting point he makes is similar to one of my past posts: the shock that the big bang started in a low entropy state despite no known mechanism to explain it. And, as with my last quote on this subject, the first thing he looks to is some sort of multiverse whereby the nearly impossible can take place on it’s own.

But here is an interesting quote:

The big bang is [in a multi-verse model] not the beginning. The big bang [might be] explained by something pre-existing to that [in a bigger multi-verse], and that is the only hope I think we have of dynamically coming up with a reason why our observable universe had a low entropy in early times.