Our eyes only see the big dimensions, but beyond those there are others that escape detection because they are so small.

There may be many Big Bangs that happened at various and far-flung locations, each creating its own swelling, spatial expanse, each creating a universe - our universe being the result of only one of those Big Bangs.

Einstein's theory of relativity does a fantastic job for explaining big things. Quantum mechanics is fantastic for the other end of the spectrum - for small things.

I've seen children's eyes light up when I tell them about black holes and the Big Bang.

One of the strangest features of string theory is that it requires more than the three spatial dimensions that we see directly in the world around us. That sounds like science fiction, but it is an indisputable outcome of the mathematics of string theory.

I can't stand clutter. I can't stand piles of stuff. And whenever I see it, I basically just throw the stuff away.