科学研究   

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Steve: Hey Phil. How are you? Phil: Good Steve. Steve: So you just got back from Europe. Where were you? Phil: I was in Salzburg attending the Salzburg Global Seminar on Animal and Public Health. ...

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Think of how many letters fit on a single page. And now imagine a stack of pages 300 feet tall. That's how much information is stored in the DNA inside every human cell-- the entire human...

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Musser: Well the real impetus is that we've just come up to the fiftieth anniversary of the dawn of the space age, on October 5th?some people think it is October 4th, but actually it's October 5th, 19...

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No-one would have believed in the last years of the nineteenth century that this world was being watched keenly and closely by intelligences greater than man. You may know H. G. Wells for his icon...

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Steve: I'm sitting in Central Park with Nat Bletter. Nat is an ethnobotanist. Why don't you start off by explaining what ethnobotany is and what you do? Bletter: Okay. Thanks for having me on Steve. ...

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Nothing in the universe is static. In the Milky Way, billions of stars orbit the galactic center. Some, like our Sun, are pretty consistent, keeping a distance of around 30,000 light years from the ...

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DNA is under constant attack from reactive chemicals and natural background radiation. Free radicals are the byproducts of normal metabolism in human cells. Seen here as bright particl...

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Steve: One of the key points in the article is that it's very difficult to do nutrition research, about human nutrition. Why is that so difficult? Nestle: Well, everybody eats, first of all, and peop...