We explore because we are human and we want to know. I hope that Pluto will help us on that journey.

If any one of about 40 physical qualities had more than slightly different values, life as we know it could not exist.

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

Simplicity is a matter of taste

There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.

Disorder increases with time because we measure time in the direction in which disorder increases.

The progress of the human race in understanding the universe has established a small corner of order in an increasingly disordered universe.