英语听力文摘 English Digest 545、为什么高海拔会引起头痛？

Why Does Altitude Cause Headache? Mountain climbers face many dangers as they brave the cold winds and icy slopes and jagged cliffs of the peaks they climb. But one of the most serious dangers they face is all in their headsliterally. Why does altitu

英语听力文摘 English Digest 544、短信脖子病来了！

Beware Of Text Neck! Remember when the Blackberry was all the rage, and people worried about straining their thumbs typing on that tiny keyboard? Well, now that the iPhone and other smart phones have taken center stage, theres another malady gaining

英语听力文摘 English Digest 543、什么是鲜奶油？！

What Is Whipped Cream? It adorns ice cream sundaes, pumpkin pie, gingerbread, and hot chocolate. Its sweet creaminess tantalizes taste buds and sends dieters running from the scale. Did you ever wonder why heavy cream whips into soft, light peaks? Yo

英语听力文摘 English Digest 542、糜鹿也有关节炎？！

Did You Know That Moose Can Have Arthritis? Its easy to tell, even at a glance, that people and moose are pretty different. Moose, at least males, have big, wing shaped antlers. People have no antlers. Moose are herbivores, eating only plants. We eat

英语听力文摘 English Digest 550、大脑和内脏之间有联系吗？

Is There A Connection Between The Brain And The Gut? Most people realize there is a brain gut connection. Nervous tension can aggravate irritable bowel syndrome and common dyspepsia, or stomach upset. If the brain can upset the gut, can the gut upset

英语听力文摘 English Digest 614、格陵兰岛神奇的计数法

How People In Greenland Learn How To Count Kids learn to count on their fingers, because theyre so, well, handy! And it makes sensemost number systems originally developed as people counted using their fingers. The counting system of native Greenland

英语听力文摘 English Digest 613、酸奶中的神秘液体

The Mysterious Liquid In Yogurt When you open a container of yogurt, youll often see liquid collected on top. Some people mix it back into the yogurt, and others drain it off. What is it, and where does it come from? To solve the mystery of the liqui

英语听力文摘 English Digest 612、可怕的天花

The History Of Smallpox In Shakespeares day, wishing a pox on someone was a terrible curse. Ten percent of the population in 17th century London died gruesomely of smallpox, a virus spread easily by airborne particles or contaminated clothing. Infect

英语听力文摘 English Digest 610、有孩子的夫妻家庭更幸福

Parents May Be Happier Than Childless Couples Dear A Moment of Science, Im a parent of two young kids. Its challenging, but overall a very rewarding experience. Yet I keep hearing about studies suggesting that parents are less happy than childless co

英语听力文摘 English Digest 609、人类语言的起源

Scientists have searched for the origins of human speech in the hoots, grunts, and other vocalizations made by primates. It would seem to make sense, after all, that such sounds may be related to the more varied and articulated sounds we humans make.

英语听力文摘 English Digest 608、大自然中的DNA交易

Wouldnt it be great if we could trade genes with other species? For example, suppose you could trade the family cat your genes for intelligence for its genes for physical coordination! Well, okay, thats not likely to happen anytime soon. But DNA trad

英语听力文摘 English Digest 607、气泡制造

Even as adults we still enjoy blowing bubbles, dont we? If youve ever wondered why blowing on a thin film of soapy water creates bubbles, this is your lucky day. All liquids have a property called surface tension. Take water, for example. Water molec

英语听力文摘 English Digest 606、鲸鱼会被晒伤吗？

The ozone layer is thinner than it used to be. This fact has motivated humans to keep themselves protected from the suns ultraviolet, or UV, rays. But just because we can protect ourselves from these rays doesnt mean that they dont still existthey ex

英语听力文摘 English Digest 604、声速测量

In the 17th century, the French scientist Pierre Gassendi knew that light traveled faster than sound. When a gun fired far away, he could see the flash of gunshot long before he heard the report. Gassendi tried to measure the speed of sound by clocki

英语听力文摘 English Digest 603、听诊器是怎么发明出来的？

In the early 1800s, a French physician named Ren Laennec had a dilemma. He needed to listen to the heart sounds of a young woman with signs of heart disease. But the only method of listening to heart sounds known to Western medicine at the time was s

英语听力文摘 English Digest 602、抑郁可能对进化有好处

Feeling down? Youre not alone. If depression seems pretty common, it is. One in every ten adults suffers from depression. And thats what has scientists puzzled. If depression is a detrimental condition, why is it so rampant in the population? Some sc

英语听力文摘 English Digest 601、树叶与太阳能板

Leaves Inspire Better Solar Panels What do leaves and solar panels have in common? Both absorb sunlight and turn it into energy. But while solar panels typically have smooth surfaces, leaves have tiny wrinkles and folds that allow for maximum light a

英语听力文摘 English Digest 600、科学家如何预测火山喷发？

its time again for the A Moment of Science mailbag. A listener writes: Dear A Moment of Science, Ive always been fascinated by volcanoes. So I was wondering: How well can scientists predict when and where a volcano will erupt? Intersting question. Th

英语听力文摘 English Digest 605、冰山一角

Everyone knows the story of the Titanic, the great ocean liner that struck an iceberg and sank to the bottom of the Atlantic. Less widely known is the icebergs story: where did it come from, and how did it get in the way of the ship? Although the vas

英语听力文摘 English Digest 576、希腊不总是人间天堂！

Greek Island Shows Signs Of Volcanic Unrest Fira is a typical Greek city overlooking the Aegean Sea. Sitting atop a twelve hundred foot cliff on Santorini Island, its an ideal vacation spot. But this island wasnt always a paradise. Thirty five hundre