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科学研究   

2022-03-31   Intermediate
Our Future in Space

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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...


2022-03-31   Video
Things You Didn't Know About H. G. Wells

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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...


2022-03-29   Intermediate
Ethnobotany and the Search for Useful Plants

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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. ...


2022-03-29   Video
How to Move the Sun

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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 ...


2022-03-27   Video
DNA Damage and Mutations

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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...


2022-03-25   Intermediate
What to Eat

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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...


2022-03-25   Video
3D Printing for Paleontology

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3D printing is fairly new to Palaeontology. It allows scientists to print their own replicas of fossils based on X-ray scans of the originals. One of the most famous fossils to be scanned is Lucy: ...


2022-03-24   Pre-Intermediate
Man First Walked on the Surface of the Moon

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On a cold October day in nineteen fifty-seven, the Soviet Union launched a small satellite into orbit around the Earth.Radio Moscow made the announcement."The first artificial Earth satellite in the w...


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