The main challenge that television presents is that I have a tendency to say things with a great deal of precision and accuracy. Often a description of that sort, which will work in a book because people can read it slowly - they can turn the pages back and so on - doesn't really work on TV because it interrupts the flow of the moving image.

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

How can a speck of a universe be physically identical to the great expanse we view in the heavens above?

Science is a way of life. Science is a perspective. Science is the process that takes us from confusion to understanding in a manner that's precise, predictive and reliable - a transformation, for those lucky enough to experience it, that is empowering and emotional.

Science is the greatest of all adventure stories, one that's been unfolding for thousands of years as we have sought to understand ourselves and our surroundings.

All you are is a bag of particles acting out the laws of physics. That to me is pretty clear.

We might be the holographic image of a two-dimensional structure.