标签：时差 相关文章
On our last program we discussed a simple experiment run by an Alexandrian named Eratosthenes in the third century B.C. By noting that, at the same time of day, sticks in the ground cast different-length shadows depending on whether they were in a no
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In October of 2000, biologists on a research boat off the coast of Chile happened upon what seemed to be a group of sleeping whales. The sperm whales were completely still and hanging vertically in the water with their noses up toward the surface, an
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Dear Annie: My 24-year-old son and his wife are the parents of two toddler boys and are expecting another baby soon. They live four hours away. I recently learned that my son goes off to work early in the morning and his wife sleeps until noon, while
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Don: [TO SELF] Number 9...osprey. Yael: Hey Don. What's up? D: I'm making a top ten list of the best animals of all time. Y: What's on the list? D: Dingo, aardvark, python, tapir, rhesus monkey, black widow, bullfrog, owl, osprey. Y: That's only nine
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Walking on penguin eggshells on this Moment of Science. Yael: Today, we're talking penguin eggs. Don: Why? Y: Penguins lay their eggs on hard surfaces near coastlines, or they might dig burrows if the soil permits. And because they're optimized for s
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Mike: I'm so excited, Amanda! I just qualified to participate in a singing contest on TV. I'm going to be a famous singer and everyone is going to be listening to my music and saying my name. Girls will be all over me and people on the street won't b
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Look at a map of Hawaii and you'll see volcanic islands strung out like pearls on a necklace. The biggest--and the youngest--is Hawaii, in the south-east corner. As the islands stretch away to the north-west they become older and more worn. While Haw
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Dear Annie: I live with my boyfriend, Mike, in a very small apartment. Last month, his mother and 14-year-old sister moved in. They had nowhere else to go. His mom has no money and nothing to contribute except for some food stamps, which keep the pan
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So because of its high sugar concentration, pure honey will never ferment or go bad. It may crystallize but by soaking the jar in hot water you can turn it back into a liquid. Adding water, however, lowers the concentration of sugar in the honey and
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Monitors frame our relationship with our computers and a great computer is only as good as its monitor. Although nearly every flat screen monitor is based on LCD technology, there are differences between the models. Apart from the price, one of major
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Is heading in soccer dangerous? It's a question that has met its fair share of controversy. If you've never played soccer, heading may look pretty dangerous to the poor brain. Where else in life do you not want to duck away from an object flying stra
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A staff member of the Kenting National Park Administration Office reminded parents that August at Kenting National Park in the southernmost county of Pingtung is a good time to see barn swallows and land crabs. The sight of hundreds of swallows perch
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Don: Time once again for Surprise Finding. This is where we report on some experiment where you think you know the outcome, but then mother nature surprises us again. Ready? Ya?l: Ready. D: Analyzing data from a five-year study, Stephanie Brown, a ps
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Amanda: Check out this new folding bicycle that my boyfriend bought for me! We've decided to keep fit together by riding around town whenever we get the chance. Mike: Oh, that's nice, but it kinda looks dorky with those small wheels. And what's even
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Don: Say you're looking at an object on a table in front of you. How long do you think your eyeballs stay in one position? Ya?l: You mean, how long before they move? I'm going to guess... a minute. D: More like less than a second. Y: Yow! D: Though w
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When you've been to the zoo have you noticed how some of the animals pace around a lot? In this Moment of Science Don and Ya?l discuss one explanation for this behavior. D: Ya?l, I went to the zoo yesterday, and boy, the polar bear just kept pacing i
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In two studies, scientists showed volunteers a series of words or images while their brains were being monitored. The volunteers were not told it was a memory experiment, so they made no special effort to memorize the words or scenes. After the exper
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Don comes up with another entrepreneurial venture, but Yael straightens him out just in time. [Thunder] Y: What are you doing outside, Don? It's about to rain. D: I'm setting up bottles. Y: I can see that. But why? D: For my new business venture: bot
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Today, a fever is an uncomfortable nuisance, but a hundred-plus years ago, fevers were often fatal. The difference between then and now is the class of drugs known as antibiotics. As the name implies, anti-biotics work against life, or, more specific
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Now, keep in mind that the re may be other reasons to buy organic vegetables. Some people prefer the taste. And because pesticides and fertilizers can pollute rivers and contribute to dead zones in oceans, using less of these chemicals is good for th
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