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.

We see the universe the way it is because we exist.

So great a contribution to physics was Two New Sciences that scholars have long maintained that the book anticipated Isaac Newton's laws of motion.

Government works best under the glare of public scrutiny. Absent such scrutiny, abuses occur.

Computers double their performance every month.

One cannot really argue with a mathematical theorem.

It's the gravity that shapes the large scale structure of the universe, even though it is the weakest of four categories of forces