What if the Big Bang wasn’t the beginning of the universe, but only one stage in an endlessly repeated cycle of universal expansion and contraction?
So suggests mathematical physicist and string theorist Neil Turok. He thinks there may be many universes, at once interpolated but separate, like a mixture of gases. These universes are attracted to each other; every few trillions of trillions of years, they collide, explode, expand and contract, then repeat the sequence all over again.
I recently spoke with Turok, winner of the first TED Prize of 2008, for an upcoming Wired News Q&A. Here are some outtakes from our conversation:
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