Sometimes I wonder if I'm as famous for my wheelchair and disabilities as I am for my discoveries.

Although September 11 was horrible, it didn't threaten the survival of the human race, like nuclear weapons do.

To my mathematical brain, the numbers alone make thinking about aliens perfectly rational.

Everyone can enjoy a life of luxurious leisure if the machine-produced wealth is shared, or most people can end up miserably poor if the machine-owners successfully lobby against wealth redistribution.

One could imagine such technology outsmarting financial markets, out-inventing human researchers, out-manipulating human leaders, and developing weapons we cannot even understand.

Every man should marry. After all, happiness is not the only thing in life.

Even if there is only one possible unified theory, it is just a set of rules and equations. What is it that breathes fire into the equations and makes a universe for them to describe?