You start doing the addictive behavior to feel good and then your receptors get overloaded with dopamine, then you stop doing the addictive thing and some of the receptors have shut down and you don't have enough dopamine to feel good. So then you feel bad and go back to the addictive behavior to get more dopamine. The strange thing is that it works with what we think of as uppers and downers and whatever you call gambling - sidewaysers.

I am so old, I entered engineering school with a slide rule. And I left engineering school with a calculator. I can still use a slide rule but it's not a skill you especially need anymore.

I've got no problem with anybody's religion. But if you go claiming the Earth is only 10,000 years old, that's just wrong.

There really is no such thing as race.

My father was a very good Boy Scout. He was very skilled with knots, and he showed me how to tie a bow tie.

Science is the best thing humans beings have ever come up with. And if it isn't, science will fix it.

We are just a speck, on a speck, orbiting a speck, in the corner of a speck, in the middle of nowhere.