Horizons: Parallel Universes

00:00:03 Imagine you could find an explanation for everything in the Universe

00:02:13 The only explanation which anyone could come up with

00:04:33 On the ice rink I am communing with the fundamental laws of physics.

00:06:46 There would soon be no big scientific problems left.

00:08:47 that it immediately began to sound like a perfect Theory of Everything.

00:10:54 when the Universe was a few hundred thousand years old

00:12:57 it really says absolutely nothing about the Big Bang.

00:14:46 would evolve into the single definitive explanation for the Universe

00:16:44 If String Theory really was this so-called Theory of Everything

00:18:37 The extra dimensions were spaces in the Universe which we could never perceive.

00:20:10 I wasn't sure when and I wasn't sure how

00:21:56 Well it was a wonderful feeling

00:23:58 M Theory.

00:25:30 from every point in our three-dimensional world.

00:27:24 Most of them we understand at some level and then there's gravity

00:29:03 even though it's fundamentally just as strong as everything else

00:30:53 Now suddenly physicists all over the world

00:32:52 was that the eleventh dimension was a tranquil place

00:34:55 This is the deepest problem in cosmology.

00:36:34 On the journey they began to throw ideas around.

00:38:17 Now they had to explain how the collision of two parallel universes

00:40:14 Time could, can be followed through the initial singularity.

00:42:10 Big Bangs probably take place all the time.

01:00:03 Big Bang. Absolutely fantastic.