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听力文摘：屎壳郎的眼睛
The Eye of the Dung Beetle 屎壳郎的眼睛 A number of animals, including honeybees and butterflies, use sunlights polarization in their navigations, but the dung beetle is the first animal ever discovered to use moonlights polarization to guide i
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听力文摘：用“耳朵”治口吃
Stuttering Ear 用耳朵治口吃 Remember that kid in your grade school class who stuttered? Well, he was in good companya whopping three million people in the United States alone are affected by this problem. 还记得小学时班上那个说话结巴
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听力文摘：精子靠“嗅觉”发现卵子
SpermSniff Out Their Targets 精子靠嗅觉发现卵子 Scientists who study human sperm have long wondered whether human sperm could somehow sense the presence of an egg. Then, just about a decade ago, it was discovered that sperm have proteins on
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听力文摘：为什么外星人不吃我们呢？
Why Aliens Won't Eat Us 为什么外星人不吃我们呢？ Are aliens going to eat us? 外星人会来吃我们吗？ That's more of a science fiction question. But science does have something to say here, and sometimes purely imaginative questions
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听力文摘：鸟是如何呼吸的
How Birds Breathe 鸟是如何呼吸的 Don, flying is tougher than walking or running, right? So how come birds dont get winded and run out of breath? 飞行比走路和跑步都要困难些，对吧？那为什么鸟类飞行的时候不会喘不过气
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听力文摘：购物和蜂鸟
Shopping and Hummingbirds 购物和蜂鸟 Did you know, Don, that your shopping habits maybe similar to a hummingbird's? 东,你知道也许你的购物习惯和蜂鸟的相似吗？ Are you going to tell me that hummingbirds are also sold on flash c
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听力文摘：你崇拜明星吗？
Celebrity Worshipers 你崇拜明星吗？ Psychologists have found that people who believe in a just world are more likely to worship celebrities, whereas people more critical of society are less likely to obsess over a celebrity. People who strongl
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听力文摘：为什么戴隐形眼镜看东西更清楚？
Making Contact 为什么戴隐形眼镜看东西更清楚？ I get contact lenses to replace my glasses and it's like I'm seeing the world through new eyes. It's miraculous! 终于摆脱框架眼镜了，从隐形眼镜看世界，感觉是全新的！
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听力文摘：带紫外线的鱼儿
Ultraviolet Fish 带紫外线的鱼儿 So you want to attract a mate. After all, passing on your genes is what evolution is all about. To do that you need offspring, and to get a lot of those you need to be attractive. The flashier the better. Hey, l
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听力文摘：青少年吸毒问题
Adolescent Addictions 青少年吸毒问题 What makes adolescents so vulnerable to developing addictions to substances like nicotine, alcohol, and drugs? Teens, in particular, seem more vulnerable than any other age group. Is it a result of peer pre
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听力文摘：成吉思汗疯狂的基因
DNA Wrath of Khan 成吉思汗疯狂的基因 Today, Afghanistan is a war-torn region, battled over by military forces and world-spanning empires. Eight hundred years ago things were much the same. Only then, there was only one ruler: Genghis Khan. 军
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听力文摘：犬吠为何？
Why Dogs Bark? 犬吠为何？ Have you ever wondered why do dogs bark? 你可曾想过犬缘何而吠呢？ In terms of evolution, there has to be a reason for barking, or it probably wouldnt be there. Is it to warn of predators? But dogs bark when
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听力文摘：脱水
Dehydration 脱水 If I were to stop drinking water right now, how long could I live? 如果从现在开始停止喝水，能活多久呢？ There are different factors involved here. A human being isnt an automobile which needs a certain amount of g
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听力文摘：骨质疏松症
Osteoporosis 骨质疏松症 Todays word is: osteoporosis! 今天的词是：骨质疏松症！ Yep, osteoporosis. Now, youve heard this word before, and you know it has something to do with bones. But can you actually explain what it is? 是的，骨质
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听力文摘：鼾声和认知能力
Snoring and Cognition 鼾声和认知能力 Snoring can be pretty disturbing to people who sleep in the company of snorers, as well as to the snorer himself or herself, though she may not realize it. For instance, some snorers have a condition called
