Stars are phoenixes, rising from their own ashes.

I think the discomfort that some people feel in going to the monkey cages at the zoo is a warning sign.

The Cosmos is all that is or ever was or ever will be.

In science it often happens that scientists say, "You know that's a really good argument; my position is mistaken..."

It is clear that the nations of the world now can only rise and fall together. It is not a question of one nation winning at the expense of another. We must all help one another or all perish together.

Scientists make mistakes. Accordingly, it is the job of the scientist to recognize our weakness, to examine the widest range of opinions, to be ruthlessly self-critical. Science is a collective enterprise with the error-correction machinery often running smoothly.

If all the suns but ours collapsed tonight, how many lifetimes would it take us to realize that we were alone?