Intelligence is the ability to adapt to change.

Obviously, because of my disability, I need assistance. But I have always tried to overcome the limitations of my condition and lead as full a life as possible. I have traveled the world, from the Antarctic to zero gravity.

Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space.

One can't predict the weather more than a few days in advance.

Equations are just the boring part of mathematics. I attempt to see things in terms of geometry.

The idea of 10 dimensions might sound exciting, but they would cause real problems if you forget where you parked your car.

It is impossible to imagine a four-dimensional space. I personally find it hard enough to visualize a three-dimensional space!