Evolution is not something you can believe in or not believe in like do you believe in gravity.

But as the cerebellum degrades with age, so does the quality of memories. The memories are there, but they're not as good.

Science provides a much more satisfactory way to seek answers than does any religion.

The Big Bang banged, and for some reason we’re here. And that’s astonishing. And that we can understand that, that’s the most astonishing.

History is but the record of the public and official acts of human beings. It is our object, therefore, to humanize our history and deal with people past and present; people who ate and possibly drank; people who were born, flourished and died; not grave tragedians, posing perpetually for their photographs.

I hope climate science becomes the big thing. And then what I want is electrical engineers to solve the world's energy problems, energy distribution problems. I want mechanical engineers to make better transportation systems. I want chemical engineers to develop better solar panels, and so on.

As you may know, I am a mechanical engineer.