科学美国人60秒 SSS World Wilderness Down 10 Percent in 20 Years

Only about 23 percent of the worlds land area is still what youd call wildernesswhere indigenous people, wildlife, plants and microbes get a chance to live with little or no disturbance from large human populations. But even that current figure of 23

《英语流行话题阅读:语境识词4500》24 Is Beauty an Advantage?

Unit 24 Is Beauty an Advantage? Is beauty an advantage? Does it make the beautiful individual powerful? Does it result in substantially better pay and opportunities in the workplace? Ten years ago, feminist author Woolf wrote about the beauty myth. W

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 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

双语有声阅读:Eurasians in the Sportlight "混"出名堂

Eurasians in the Sportlight 混出名堂 Can an ethnic mix be trendy? At the moment, Eurasians are enjoying an unprecedented high profile in the news, in advertising, and in the entertainment industry. People of numerous cultures have embraced Eurasi

2006年VOA标准英语-Study: Boys Born During Social Upheaval Li

By Jessica Berman Washington 25 January 2006 Researchers have long observed that during times of social stress, there are fewer male births than female births. Now, a new study has found that boys bor

2005年NPR美国国家公共电台九月-Scientists: Male Chromosome Won't Lead to

Scientists at the Whitehead Institute in Cambridge, Massachusetts say it's fortunate for humans that the Y chromosome is not on the verge of extinction. That's because the Y is the chromosome that makes males males. The outlook is less favorable for

VOA标准英语2012--Study: English Language Rooted in Turkey

Study: English Language Rooted in Turkey The Indo-European language family - which includes English, French, Russian, Persian and even ancient Greek - is one of the worlds largest language groups and extends from Iceland in the West to Sri Lanka in t

VOA标准英语2011--Sense of Smell Jumpstarted Brain Evoluti

Sense of Smell Jumpstarted Brain Evolution Mammals have much bigger brains than other animals. Scientists aren't sure exactly why, but new research published this week in the journal Science suggests it might have something to do with mammals' acute

[科学美国人60秒] SSS 2015-11-13

H. Monkey, from their on south Africa rain forest they produce some of the loudest animal calls in the world. They are about the size of a but they can sound as large as ahas long suspected that the monkeys play a role in attracting mates. the sounds

英语听力：2013-04-03 恐龙之战之极限生存 Extreme Survivors—7

Male lions defend their cubs against rivals who see their offspring as future competition for food and mates. So its likely that an intelligent predator like T-Rex would do the same. Compared to prehistoric plant eaters, its cerebrum, the part of the

2006年VOA标准英语-Neanderthal Gene Studies Define Ties to Modern

By David McAlary Washington 15 November 2006 Examination of a bone fragment from our long extinct relatives, the Neanderthals, has yielded unprecedented genetic information about their mysterious relationship to modern humans. It shows that both hum

2007年VOA标准英语-Scientists Find Gene Linking Lifespan to Calori

By David McAlary Washington 02 May 2007 U.S. researchers have discovered a gene that promotes longer life in earthworms that eat much less than normal. Humans have similar genes, and VOA's David McAlary reports that, if they work the same way as in t

英语听力文摘 English Digest 414、天生的猎手

Snake Vision Snakes have heat-vision that allows them to catch their dinners in the dark. True or false? True! It isnt quite right to call it vision, thoughmore accurate would be to say that certain specie s , such as rattlers, have pit s just under

英语听力文摘 English Digest 325、树跟人类是近亲？

Is A Tree Related To Me? 树跟人类是近亲？ Last time we talked about the false belief that evolutionary theory says human beings descended from monkeys. In fact, evolution says that both human beings and monkeys descended from a common ancesto

英语听力文摘 English Digest 343、人人都会读心术？

Mind Reading 读心术 Sometimes we get letters here asking whether psychic s are for real. Well, despite the t.v. shows, there isnt any scientific evidence that psychic powers, such as mind-reading, actually exist. That doesnt prove they dont existj

英语听力文摘 English Digest 353、骨质疏松症

Osteoporosis 骨质疏松症 Todays word is: osteoporosis ! 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? The answer is straight-forward. It comes down

英语听力文摘 English Digest 181、蛇的视力

Snake Vision 即使在晚上，蛇也能凭借它超常的视力抓到食物。究竟为什么，听听就知道了。 Time for True or False.We 'A Moment of Science' gives you a scientific claim that you may have never heard before and then tells yo

英语听力文摘 English Digest 278、形态各异的狗

Mans Best Friendin All Shapes and Sizes Scientists are making great strides in understanding the genes that allow such a wide range of shapes, sizes and personalities in different dog breeds. Did you know domestic dogs were bred from wolves about 15,

英语听力文摘 English Digest 266、大灭绝

Coextinction 绝种是指生物群体逐渐消失的过程。物种和较大族群常态性的灭绝，并由更进步的形式所取代，这是进化的正常过程。然而，从化石的记录来看，有时会出现整个科目的动物和植物都