When I was growing up, I wanted passionately to be a physicist.

If you're a white male growing up in this society, you're constantly receiving encouragement to go on in science in the form of all the images that you're receiving.

When I was in seventh grade, I was bored out of my mind. We seemed to be learning the same things over and over in science and math, and two of the boys in my class were allowed to move ahead into these advanced classes, but I wasn't allowed because I was a girl.

The world is a complex place.

The climate is changing, but the question is how much - and to what extent human factors are contributing to that.

If we're going to pass international trade agreements, as we should, they should have similar kind of rules, not as high a wage as obviously as a steelworker in the U.S. or in Lorain, Ohio, but certainly rules on the environment and worker safety. You go to Mexico, you don't see those kinds of worker protections or environmental safeguards.

The irony here is this administration is spending more money on climate change research and development than any administration in all the rest of the industrialized world combined.

The mammoth was basically done in by climate change. The last ones survived on Wrangel Island, north of Chukotka, until 3,700 years ago. According to Eveny mythology, mammoths scooped up dirt with their tusks to form the first dry land.