Physicists are more like avant-garde composers, willing to bend traditional rules... Mathematicians are more like classical composers..

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 tryi….

Quantum Mechanics is different. Its weirdness is evident without comparison. It is harder to train your mind to have quantum mechanical tuition, beca….

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

The bottom line is that time travel is allowed by the laws of physics..

Science is very good at answering the 'how' questions. 'How did the universe evolve to the form that we see?' But it is woefully inadequate in addres….

Every moment is as real as every other. Every 'now,' when you say, 'This is the real moment,' is as real as every other 'now' - and therefore all the….

The melded nature of space and time is intimately woven with properties of light speed. The inviolable nature of the speed of light is actually, in E….

The pinpoints of starlight we see with the naked eye are photons that have been streaming toward us for a few years or a few thousand..

When I give this talk to a physics audience, I remove the quotes from my 'Theorem'..

In the far, far future, essentially all matter will have returned to energy. But because of the enormous expansion of space, this energy will be spre….

Oftentimes, if you're talking to a seasoned interviewer who asks you a question, they may do a follow-up if they didn't quite get it. It's rare that ….

But if you think about a practical implication of enriching your life and giving you a sense of being part of a larger cosmos and possibly being able….

All mathematics is is a language that is well tuned, finely honed, to describe patterns; be it patterns in a star, which has five points that are reg….

The idea that there could be other universes out there is really one that stretches the mind in a great way..

Falsifiability for a theory is great, but a theory can still be respectable even if it is not falsifiable, as long as it is verifiable..

In essence, we string theorists have been trying to work out the score of the universe, the harmonies of the universe, the mathematical vibrations th….

That is, you can have nothingness, absolute nothingness for maybe a tiny fraction of a second, if a second can be defined in that arena, but then it ….

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, ….

When you buy a jacket, you pick the size to ensure it fits. Similarly, we live in a universe in which the amount of dark energy fits our biological m….

When we benefit from CT scanners, M.R.I. devices, pacemakers and arterial stents, we can immediately appreciate how science affects the quality of ou….