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Anchukaitis: The raw materials for what we do are of course trees and their rings and [what you're] actually looking at when you see the tree ring is two different types of cells. So in the early part...

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"Darwin's Influence on Modern Thought" by Ernst Mayr. Clearly, our conception of the world and our place in it is, at the beginning of the 21st century, drastically different from the zeitgeist at th...

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Steve: So Graham, this is pretty exciting series of programs. Just give us a general idea of what the audience is going to be in for? Townsley: What we are trying to do in this NOVA series is a numbe...

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Hawks: When you have a new mutation, one of the things about it is that [if] it is selected [it] increases [extraordinarily] slowly for a long time. Our best [estimate of] the age of the lactase [vers...

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Steve: Lucy's Legacy: The Quest for Human Origins with the discoverer of the world famous Australopithecus skeleton known as Lucy, Donald Johanson. The title is Lucy's Legacy. What is Lucy's legacy? ...

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Stringer: Obviously there was an old view that when people got into Britain half a million years ago, they were always here right through to the present. And we now know that's completely wrong; [that...

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Mariette: Well, many [of] you know the big force known as the baby boomers are all rich and, you know, the youngest of us are 45 and the oldest up until the—around the 60s now—and many of us are start...

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Musser: I just wanted to [ask] your thoughts on some of the sociological and kind of social-technical, technological themes of the film as you see them. What are the things you're really trying to bri...