The media need superheroes in science just as in every sphere of life, but there is really a continuous range of abilities with no clear dividing line.

If we can avoid disaster for the next two centuries, our species should be safe as we spread into space. If we are the only intellegent beings in the galaxy we should make sure we survive and continue. . . . Our only chance of long-term survival is not to remain inward looking on planet Earth but to spread out into space. We have made remarkable progress in the last hundred years. But if we want to continue beyond the next hundred years, our future is in space.

Children in backseats cause accidents. Accidents in backseats cause children.

A lot of prizes have been awarded for showing the universe is not as simple as we might have thought.

I don't think the human race will survive the next thousand years, unless we spread into space.

There are too many accidents that can befall life on a single planet.

I don't think the human race will survive the next thousand years, unless we spread into space. There are too many accidents that can befall life on a single planet. But I'm an optimist. We will reach out to the stars.