英语听力文摘 English Digest 557、为何我们的汗水不好闻？

Why Does Sweat Smell So Bad? Our bodies have two main kinds of sweat glands. The sweat glands that are distributed over most of the body produce an innocent, clear sweat thats more than ninety-nine percent water. As this watery sweat rinses your skin

英语听力文摘 English Digest 571、穴居人远比我们想象的聪明！

Neanderthals Were Sophisticated We modern humans tend to look down on our ancient Neanderthal cousins. In our imagination, Neanderthals were brutish, cave dwelling lunks who couldnt hack it once we left Africa and set up shop in Neanderthal territory

英语听力文摘 English Digest 559、世界上最大的痰盂！

The Worlds Biggest Spittoon In the spring, the eastern half of North America turns into one big spittoon for spittlebugs. Wandering through a meadow, its easy to spot the gobs of foam they produce, stuck to the stems of various plants. What makes spi

英语听力文摘 English Digest 629 值夜班

Working The Night Shift Its time to go again to the A Moment of Science mailbag. A listener writes: Dear A Moment of Science, My husband works a night shift, and Im worried that it might be affecting his health. He sleeps during the day, but somehow

英语听力文摘 English Digest 628、太空中进餐！

Why Do Zebras Have Stripes? For many animals, camouflage is an important part of survival. A leopards spotted coat and a polar bears white fur help them blend into their respective environments. But a zebras bold stripes cant help to disguise it in i

英语听力文摘 English Digest 627、香菜：爱他还是恨他？

Cilantro: Love It Or Hate It? On todays Moment of Science, well be sniffing our way through a controversial culinary conundrum: the great cilantro debate. According to scientists working at the Monell Chemical Senses Center, the smell of cilantro usu

英语听力文摘 English Digest 626、我们只用了大脑的10%吗？

Do We Only Use 10% Of Our Brains? Have you ever heard that we humans use only ten percent of our brains? This oft-quoted myth holds a certain appeal because if it were true, then we could instantly become ten times more intelligent just by firing up

英语听力文摘 English Digest 620、白金为何是白色的？

What Makes White Gold White? Many people associate the metal gold with the color gold. But, some gold jewelry is not golden at all: its white. Golden Color Gold is one of the heaviest and softest metals. Pure gold, called 24-carat gold, is so soft th

英语听力文摘 English Digest 622、午休的学问

The Science Of The Siesta When you go back to work or class after lunch, why is it so hard to stay awake? Although we get energy from food, we also use lots of energy to digest it. Your energy use increases 25-50% as you digest a meal. With all that

英语听力文摘 English Digest 620、冰块如何使饮品冷却？

How Does Ice Cool Drinks? Heres something we tend to take for granted: drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work? Heat is a measure of molecular activity: the faster a

英语听力文摘 English Digest 619、人类和猩猩有多相似？

Dear A Moment of Science, I know that humans and chimps share something like 98 percent of our DNA. But what does this really mean? At least on the surface, humans and chimps seem very different we live in houses, they live in trees. We use complex l

英语听力文摘 English Digest 618、美国人的头越来越大了

Americans Heads Are Getting Bigger The story of human evolution goes something like this: Millions of years ago, homo sapiens began to evolve from the prehistoric ancestor we share with our monkey cousins. First, we evolved the ability to walk uprigh

英语听力文摘 English Digest 617、人体如何造血？

If blood didnt circulate through our bodies, carrying oxygen and nutrients, we wouldnt be able to live. Blood is so important to life that the body constantly makes new blood. To do this, the body must produce the liquid part of blood, called plasma,

英语听力文摘 English Digest 616、父母引导健康饮食

Parents Model Healthy Eating It should come as no surprise that the more stressed parents are at work, the greater the burden on their family. Its also probably not a surprise that this dynamic can negatively affect a familys nutrition. After all, th

英语听力文摘 English Digest 615、制造属于你自己的月球陨石坑

Create Your Own Moon Craters! What makes science really fun is when you get to do things yourself, so today were going to be making moon craters. Theyre the roundish blast-marks left on the moons surface by ancient meteorites. The moons surface is co

英语听力文摘 English Digest 624、粉刺的学问

The Science Of Acne Acne: the scourge of adolescence. Most people endure it at some point, and cant wait to be rid of the combination of whiteheads, blackheads, pimples, and pustules that comprise the skin condition that affects over 80% of teenagers

英语听力文摘 English Digest 652 尼亚加拉大瀑布正在慢慢消失

Were Losing Niagra Falls! Niagara Falls has been a famous honeymoon spot for over a hundred years: some honeymooners have been more faithful to it than to each other. 图片1 When The Falls Formed Since the falls were formed during the late Pleistoce

英语听力文摘 English Digest 659 亚硫酸盐是什么？

What Are Sulfites? Youve 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? 图片1 Chemical Compounds Sulfites are chemical compounds found naturall

英语听力文摘 English Digest 658 为何要确立格林威治标准时间？

Why Was Greenwich Standard Time Created? Imagine getting on a train at twelve noon and heading out on a four-hour trip to another town. Youd expect to arrive at four oclock in the afternoon, right? But before the last few decades of the 19th century,

英语听力文摘 English Digest 656 本.富兰克林没有被雷击

Ben Franklin Did Not Get Struck By Lightning Did Ben Franklin really discover electricity with a kite? Everybody has heard the famous story of how pioneering experimenterand part-time founding fatherBen Franklin tied a key to a kite string and flew t