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Bettany: "I owe it to my children [to have the] the courage of my own convictions. My title will be On the Origin of Species." Steve: That’s Paul Bettany who plays Charles Darwin in the new movie, Cr...

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Steve: Why don't you just explain everybody what it is: virtual gold farming. DiChristina: Okay. Yeah, I love this article. It's actually, it's a fascinating area, and it's one of the ways, I think, ...

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Steve: You get home from Chile and when you were in Chile, you were trying to wrap your mind around the space-time continuum [and] the shape of space and… Alda: Well, let's say, all through Chile I h...

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Steve: What did you personally come away with from all the work that you put in on this series? Alda: I think the most interesting thing for me was about two things. One was realizing how close I was...

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Sanderson: About the hydrology of the Andes and how it serves human life in the most important suburb of La Paz, and these disappearing glaciers are going to mean that people can't live there anymore ...

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Buchholz: I am going to eat a nice Butterball turkey. I'm not going to eat a wild turkey, they're too scrawny anyway; and I will enjoy him. Steve: Now the Butterball turkey is a dom...

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Steve: So, claim number 1: Anthropogenic carbon dioxide can't be changing the climate because carbon dioxide is only a trace gas in the atmosphere and the amount produced by humans is dwarfed by the a...

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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...