Republicans are as capable of coming up with great ideas and moving this country along as anyone - they just don't do it.

I've sat looking down into a volcano that could blow at any moment; I've helped catch a shark and several rattlesnakes; I let a tarantula walk across my hand, and I ate rat soup.

Be as smart as you can, but remember that it is always better to be wise than to be smart.

My relationship with science is as someone who's curious and hungry to know, hungry to understand. So all I have to offer is my ignorance and my curiosity, which is a good combination, as long as they come together.

As I am becoming older, the only thing that speeds up is time.

I'm greedy for that satisfaction of doing something hard and knowing that, even though I was afraid I couldn't do it, that somehow I can deliver.

People who laugh together generally don't kill each other.