The upshot of all this is that we live in a universe whose age we can't quite compute, surrounded by stars whose distances we don't altogether know, filled with matter we can't identify, operating in conformance with physical laws whose properties we don’t truly understand.

...and it occurred to me, with the forcefulness of a thought experienced in 360 degrees, that that's really what history mostly is: masses of people doing ordinary things.

You don't need a science degree to understand about science. You just need to think about it.

We are so used to the notion of our own inevitability as life's dominant species that it is hard to grasp that we are here only because of timely extraterrestrial bangs and other random flukes. The one thing we have in common with all other living things is that for nearly four billions years our ancestors have managed to slip through a series of closing doors every time we needed them to.

I wish I could adjust my voice, but it's just what's happened to me. It's because I've lived abroad for a long time, and my wife is English and my kids all have English accents, and every voice I hear is English. I've never intentionally changed my accent at all.

Everywhere throughout New England you find old, tumbledown field walls, often in the middle of the deepest, most settled- looking woods- a reminder of just how swiftly nature reclaims the land in America.

When you tell an Iowan a joke, you can see a kind of race going on between his brain and his expression.