Fingernails. Theyre good for scratching, biting, clipping, and polishing. But what are they, in fact? 手指甲可以被用来划，咬，剪，磨。但是事实上，它们究竟是什么呢？ Although nails may look simple, they actually have var

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英文书摘精选 Why Humans (Not Chimps) Get Cancer为何人类而不是黑猩猩会得癌症?

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, shouldnt we be at risk for many of t

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英文书摘精选 Paper Cuts,Why So Painful?为何被纸划伤如此疼痛?

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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英文书摘精选 Why Do We Need To Brush Our Teeth?我们为什么要刷牙?

Humans may be no less a part of the animal kingdom than lions, tigers and bears, but certain things set us apart. For instance, although like our mammalian cousins we use teeth to bite and chew food, were the only animals that brush after every meal.

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英文书摘精选 What Is Spider Silk?蜘蛛丝是什么?

Whats five times as strong as steel, twice as tough as Kevlar, and can be stretched over thirty percent in length without breaking? The answer is spider silk. 什么东西的强度是钢的5倍？什么东西的韧性是凯夫拉的2倍？什么东西能

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英文书摘精选 The Genetic Relationships Between Bears熊之间的遗传关系（

Researchers at Penn State University and the University of Buffalo have completed the most in depth bear DNA study to date. The project has revealed a lot about genetic relationships between bears, and also the unlikely romances that pepper their his

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英文书摘精选 The Physics Of Rain On The Rear Window后窗玻璃上雨滴的物理现象

The next time youre driving during a rain shower, glance back at the rear window. Youll notice that while raindrops batter the front windshield, they seem to avoid the back window as long as the car is moving. How is that possible? 下一次下阵雨而

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英文书摘精选 Rototillers Of The Rockies落基山脉的旋耕机

Todays Moment of Science digs up the story behind one of the grizzly bears more unusual nicknames: the Rototiller of the Rockies. 今天科学一刻将会深入挖掘灰熊的一个不同寻常的绰号背后的故事，这个绰号就是落基山脉的

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英文书摘精选 Why Do Changes In Air Pressure Cause Ear Pains?为何气压变化导致耳朵痛?

On airplanes, cabin pressure changes during takeoff and landing to help passengers breathe easy at high altitudes. These changes in air pressure may make adults ears feel a little funny, prompting a few yawns to equalize the pressure. But for babies,

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英文书摘精选 Do Fish Drink?鱼儿喝水吗?

Fish do drink water, but how they consume it depends on where they live. Water gets into a fishs body through osmosis, the process in which water diffuses from a higher to a lower concentration. 鱼儿确实喝水，但它们怎样喝水却取决于其

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英文书摘精选 How Did Animals Survive The Ice Age?冰河世纪的动物如何生存?

During the last ice age, rapid swings in temperature occurred within decades or less, meaning populations of organisms had to adjust quickly to new environments or face extinction. 在最后一个冰河世纪中，温度在数十年甚至更短的时间

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英文书摘精选 How To Eat Less When Dining Out下馆子如何才能吃得少

When it comes to losing weight, the trick lies not so much in what you eat but in how much you consume. After all, even if you stick to whole grains, fruits, and vegetables, its still possible to eat too much, resulting in weight gain. 说到减肥，诀

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英文书摘精选 How Do Scientists Study Deadly Diseases?科学家如何研究致命的疾病?

I have a trivia question for you, Don. What do the Ebola virus, anthrax, and the avian flu have in common? 唐，我有个小问题想问你，埃博拉病毒、炭疽热和禽流感这些疾病有哪些共同的特点？ Researching Disease 疾病研究

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英文书摘精选 Death By Peanut花生致死

Peanuts are one of the worlds most nutritious foods. 花生是世界上最有营养的食品之一。 Peanuts contain pound for pound more protein, vitamins, and minerals than beef liver and more fat than heavy cream. For approximately .5% of America

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英文书摘精选 What Causes A Lump In Your Throat?什么引起嗓子哽咽?

Oftentimes when we cry, we feel a lump in the throat. Does a lump actually form, or is there some other explanation? 很多时候，当我们哭泣时，我们会感到哽咽。难道是真的在喉咙中形成了块状物？或是有其它的解释？

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英文书摘精选 Are Cockroaches Actually Useful?蟑螂实际上有用吗?

The natural History of the Cockroach, on this Moment of Science. 科学一刻为您揭秘蟑螂的自然发展历史。 For certain species of cockroach, humans make the perfect roommates. Why do cockroaches like living in our houses? And what do the

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英文书摘精选 The Power Of Cute可爱的威力

Its time to go again to the A Moment of Science mailbag. A listener writes: 又到阅读《科学一刻》栏目来信的时间了。其中一个听众来信说： Dear A Moment of Science, 亲爱的《科学一刻》栏目组， Ive heard that ownin

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英文书摘精选 What Kind Of Dogs Are Sled Dogs?雪橇狗是什么品种?

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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英文书摘精选 What Kind Of Dogs Are Sled Dogs?What Are Blisters?什么是水泡?

Remember that hit song from the 80s that featured the chorus: And I would walk five hundred miles / and I would walk five hundred more / Just to be the man who walks a thousand miles / to fall down at your door? What sounds romantic in pop song fanta

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英文书摘精选从科学的角度来说什么是厌倦

Its 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 w

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