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听力文摘：被纸划伤怎么如此疼痛?
Few minor injuries are as painful as the dreaded paper cut. Just thinking about it probably makes you cringe. However, these cuts are usually small, hardly noticeable, and rarely bleed. So what makes them so painful? 很少有一些小伤能够像被纸
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听力文摘：猩猩为什么不会得癌症?
You may have heard that humans and chimpanzees have something like 96 percent of our DNA in common. So why, then, are diseases like cancer so common in humans but so rare in chimps? If our DNA is nearly identical, shouldn't we be at risk for many of
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听力文摘：月球地表形态的无限保质期
In 1969 when Neil Armstrong said That's one small step, he made a lasting impression. On the moon, that is. 1969年阿姆斯特朗的那句人类一小步。给人留下了难以磨灭的印象。 Marks on the surface of the moon don't disappear the
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听力文摘：生病的时候为何会脱水
When you have a cold or flu, the doctor (or Dr. Mom) may tell you to drink lots of fluids. But did they ever explain why you need to guzzle all that water and juice? The extra fluid helps prevent dehydration, which can make you feel even worse, and m
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听力文摘：亚硝酸盐和红酒的渊源
You've just opened a bottle of wine for dinner. On the label, you see these words: Contains Sulfites. What are sulfites? And what are they doing in your wine? 设想一下，你在晚餐时刚刚打开了一瓶酒，你会在酒瓶的标签上看到：
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听力文摘：为何要确立格林威治标准时间
Imagine getting on a train at twelve noon and heading out on a four-hour trip to another town. 设想一下：您正乘坐一辆中午12点整出发的火车前往另外一个城市，路途耗费4个小时。 You'd expect to arrive at four o'clock i
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听力文摘：富兰克林与他的毛皮实验
When they hear the name Ben Franklin, many folks think of the Declaration of Independence, the Continental Congress and things like that. Not as many people remember that Franklin was an inventor . . . and a good one, too! He also did some pioneering
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听力文摘：为什么莴苣不能被冷冻
Stroll through the frozen foods section of the supermarket and youll find frozen corn, peas, and beans. A Moment of Science wonders, why isnt there any frozen lettuce? 你在闲逛超市的冷冻食品区的时候，会看到有冷冻玉米、冷冻豌
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听力文摘：冰河时代的植物存活到现在
Like a science fiction time traveler, an arctic plant of the late Pleistocene age, over thirty one thousand years old, is growing again after a long frozen sleep. 犹如科幻小说里的时间旅行者，一种曾存活在更新世晚期的极地植物
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听力文摘：午休的学问
When you go back to work or class after lunch, why is it so hard to stay awake? 当我们用完午餐回去工作或上课时，为什么很难保持清醒呢？ Although we get energy from food, we also use lots of energy to digest it. Your energy u
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听力文摘：脑震荡从何而来
If you follow football, hockey, soccer, or boxing, then you know that athletes in these and other contact sports are at constant risk for a concussion. Every season several football players miss a number of games after absorbing vicious blows to the
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听力文摘：雪橇狗都是什么品种
In books and movies like Call of the Wild, huge, vicious huskies pull sleds for hundreds of miles over the Alaskan tundra. A Moment of Science wonders, what kind of dogs are sled dogs? 在书里或者在像《野性的呼唤》之类的电影里，巨型
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听力文摘："厌倦"的科学解释
It's time to go again to the A Moment of Science mailbag. A listener writes: 又到了科学一刻的读信时间，一位听友写道： Dear A Moment of Science, 亲爱的《科学一刻》栏目： Everyone gets bored from time to time. But I was
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听力文摘：颜色有气味吗
Have you ever heard the color blue? Or tasted the musical note F-sharp? For most people, in both cases the answer is no. But for some people blue has a particular sound or shape, and F sharp has a slightly sour taste. This unusual blending of the sen
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听力文摘：在野外动物间的互救行为
Even without the guidance of organized religion, some animals instinctively know that it's a good thing to help others. 即使没有类似人类宗教的指引，有些动物仍能本能地救助处于危难中的其它动物。 For example, when a b
