Robert Krulwich

What happens if you are the last (the very, very last) of your species, and you die - and humans notice? We live, increasingly, at a time when extinctions are recorded, remembered, and the last animal (or plant) in its line, by virtue of its being last, becomes a kind of celebrity. Its finality becomes a thing to honor.

News, after all, is a spin of words and pictures. It's a kind of music. There are beats in a newscast, a newspaper story. Ed Murrow sounded like Ed Murrow. Huntley and Brinkley sounded different. Anderson Cooper, different still.

You make your first album, you make some money, and you feel like you still have to show face, like 'I still go to the projects.' I'm like, why? Your job is to inspire people from your neighborhood to get out. You grew up there. What makes you think it's so cool?

It turns out that the very genes that turn on in cancer cells perform vital functions in normal cells. In other words, the very genes that allow our embryos to grow or our brains to grow, our bodies to grow, if you mutate them, if you distort them, then you unleash cancer.