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[时差N小时] 时差N小时:箱子底部的玉米薄片为什么不会被压碎(下)
The friction between the flakes is the same force that causes sand to form a pile rather than spread out like a puddle. In fact, this same principle applies to all granular materials. If you cut the2011-12-08 编辑：beck
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[时差N小时] 时差N小时:为什么马的腿很细?(下)
Then that foot stops and the other one accelerates. And so on. Thinner, lighter things are easier to accelerate than heavy, massive ones. So if you want speed, put the muscles up high and the skinny2011-12-13 编辑：beck
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[时差N小时] 时差N小时:为何孕妇需要远离交通繁忙区域?(上)
Ideally, pregnant women should do everything they can to have a full term pregnancy, because babies born even a few weeks early risk being less healthy and possibly suffering from long term disabilit2011-12-16 编辑：beck
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[时差N小时] 时差N小时:为何孕妇需要远离交通繁忙区域?(下)
It’s not clear why, exactly, heavy traffic could cause premature birth. Air pollution from car exhaust could have something to do with it. Some studies have found that women exposed to high lev2011-12-19 编辑：beck
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[时差N小时] 时差N小时:抽雪茄的危害(上)
We all know that smoking cigarettes is bad. But what about smoking a pipe or cigars? Since you don’t inhale, is it better for your health? Or at least less bad? Good question. So first, it&rsqu2011-12-22 编辑：beck
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[时差N小时] 时差N小时:钻石的年龄(上)
You walk into a fancy party. What is the oldest thing there? No, not your in-laws, or even your grandparents. It will be a diamond someone is wearing. It’s not completely clear how natural diam2011-12-20 编辑：beck
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[时差N小时] 时差N小时:钻石的年龄(下)
We would never know about diamonds were it not for volcanic activity, for that’s what delivers diamonds from deep inside the earth to where we can get to them. Theoretically diamonds can remain2011-12-21 编辑：beck
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[时差N小时] 时差N小时:抽雪茄的危害(下)
One study found that people who smoke pipes or cigars are more likely than non-smokers to have chronic obstructive pulmonary disease. People with the disease have trouble breathing. Finally, if you&r2011-12-23 编辑：beck
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[时差N小时] 时差N小时:干净的东西更美味?(上)
I heard the story about how one monkey on an island figured out how to wash his food, and then other monkeys starting doing it too. That’s the true story of Imo the macaque monkey! In 1952 on t2011-12-26 编辑：beck
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[时差N小时] 时差N小时:干净的东西更美味?(下)
Infants in the next generation saw their mothers washing potatoes, and virtually all the next generation, both male and female, grew up washing their food, but not the older males! Older males were r2011-12-27 编辑：beck
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[时差N小时] 时差N小时:神奇的字符串(上)
Science is all about rationality. It’s about figuring out the way things really work. But my believe has been shaken , I heard about Michale Drosnin’s book The Bible Code. Oh, Michale Dro2011-12-28 编辑：beck
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[时差N小时] 时差N小时:对电视节目的不同体验(上)
Seinfeld was one of the funniest TV shows ever. Pretty much everyone loved it. Everyone, that is, in the United States. And probably in many other developed countries, too. Because, after all, anyone2011-12-30 编辑：beck
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[时差N小时] 时差N小时:神奇的字符串(下)
An Australian computer scientist named Brendan McKay set out recently to demonstrate that the same thing can be done with any long book. He applied Drosnin’s observational selection technique t2011-12-29 编辑：beck
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[时差N小时] 时差N小时:人类的情感(下)
Scientists studying emotions have found that basic emotions like amusement, anger, fear, and sadness are common among all cultures. And people from different cultures, whether they’re modern Am2011-12-31 编辑：beck
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[时差N小时] 时差N小时:少吃盐对健康有益(下)
But it’s worth trying to eat less. In one study, researchers used computer models to see how less salt could affect teens’ health. One result showed that reducing salt consumption by as l2012-01-10 编辑：beck
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[时差N小时] 时差N小时:基因"食谱"(下)
No matter what your cell was doing before, it will stop its healthy functioning and make only viruses, following the viral recipe until it runs out of raw materials. Then your once healthy cell burst2012-01-05 编辑：beck
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[时差N小时] 时差N小时:基因"食谱"(上)
To stay healthy, your cells must continuously perform a wide variety of chemical tasks. Your DNA genes, in the nucleus of every cell, help orchestrate this activity. A cell uses its genes as a kind o2012-01-04 编辑：beck
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[时差N小时] 时差N小时:果实成熟(上)
Usually a green, sour fruit is just a fruit that’s not ripe yet. If you left a lime on the tree longer would it eventually change color and become sweet, like an orange? Actually, limes do beco2012-01-19 编辑：beck
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[时差N小时] 时差N小时:喝尿是安全的吗?(上)
Time go again to the A Moment of Science mailbag. A listener writes: Dear A Moment of Science, Is it OK to drink urine? Not that I want to, I’m just curious. Well, the short answer is yes if yo2012-01-17 编辑：beck
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[时差N小时] 时差N小时:热量动能(上)
At one time it was believed that heat was a liquid. Sure, that sounds kind of crazy, but if you think for a second, you might see why. Suppose you have an object that’s very hot — say a metal2012-01-30 编辑：beck
