There is no debate in the scientific community...We need [Congress] to change things, not to deny what's happening.

If you meet somebody who says he or she has never dreamed of flying, I don't believe you. I mean, they're lying.

Some of the most wonderful aspects and consequences of evolution have been discovered only recently. This is in stark contrast to creationism, which offers a static view of the world, one that cannot be challenged or tested with reason. And because it cannot make predictions, it cannot lead to new discoveries, new medicines, or new ways to feed all of us.

I say to the grownups, if you want to deny evolution and live in your world, that's completely inconsistent with the world we observe, that's fine. But don't make your kids do it. Because we need them. We need scientifically literate voters and taxpayers for the future. We need engineers that can build stuff and solve problems.

The strange thing about grinding that might surprise many people is that you can grind things and shape them using materials that are generally somewhat softer than the thing you're grinding and shaping.

I abandoned my religious teachings after I read the Bible twice - cover to cover. It took me a couple of years.

I meet so many people who are intimidated by arithmetic.