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.

Energy is the ultimate convertable currency.

When kids look up to great scientists the way they do to great musicians and actors, civilization will jump to the next level

I believe we owe our young an education that captures the exhilarating drama of science.

Exploring the unknown requires tolerating uncertainty.

I've had various experiences where I've been called by Hollywood studios to look at a script or comment on various scientific ideas that they're trying to inject into a story.

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