Something bad happened on both Mars with its dried-up watercourses and Venus with its runaway greenhouse effect. Could something bad happen on Earth too? Our species currently turns row upon row of environmental knobs, without much regard to long-term consequences.

The more I learn about the universe, the less convinced I am that there's any sort of benevolent force that has anything to do with it, at all.

The day that you stop looking - because you're content God did it - I don't need you in the lab. You're useless on the frontier of understanding the nature of the world.

Thomas Jefferson basically secularized Jesus.

The universe's destiny has very little to do with the near-term destiny of Earth.

We went to the moon and discovered Earth.

We live in the kind of society where, in almost all cases, hard work is rewarded.