Some people had earlier argued that it took, 10, 20, 30 million years before you got enough heat production to limit that strength.

People in general, especially young people need to be taught more about what segregation was like. They don't understand how pervasive -- or how dangerous -- segregation was.

For asking questions about the height of the Himalayas, the height of Tibet, the height of the Andes, it's terrific. But if you go to small mountain ranges or small elevation differences, you're probably not going to be able to say much with confidence.

She's really nice and she understands students.

It's not always clear which one is the driver.

It puts a human face on this issue. Many people, if they don't have a personal connection to the troops, it's so easy for this to become a discussion that lacks seriousness and urgency. I think it's good to show that there are real people that are being affected.