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SSS 2008-08-26

时间:2010-05-14 06:48来源:互联网 提供网友:木渐浅。   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. Got a minute?

 

Don't be fooled by those big bovine1 eyes and the mouth slowly chewing cud—cows have a magnetic personality. At least that’s the claim made by German researchers in the August 26th issue of the Proceedings2 of the National Academy of Sciences. Using Google Earth images, the scientists looked down on over 8,000 cattle around the world. And, when grazing or resting, cows tended to face either magnetic north or south.

 

The researchers combined field observations with the satellite data and discovered that herds3 of both deer and cattle tend to align4 themselves north-south. Factors like wind and the angle of the sun had little bearing on how the animals stood. More often than not, like needles of a compass, heads swiveled northward5. While it’s been known that birds, bees and fish use the earth’s magnetic fields for orientation6, this study is the first to point to a magnetic sense in large mammals. The scientists speculate that this behavior may allow the animals to stay spatially7 oriented. In case danger lurks8 and a cow needs to make any sudden…moos.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Adam Hinterthuer .

 


点击收听单词发音收听单词发音  

1 bovine ys5zy     
adj.牛的;n.牛
参考例句:
  • He threw off his pack and went into the rush-grass andand munching,like some bovine creature.他丢开包袱,爬到灯心草丛里,像牛似的大咬大嚼起来。
  • He was a gentle,rather bovine man.他是一位文雅而反应迟钝的人。
2 proceedings Wk2zvX     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
3 herds 0a162615f6eafc3312659a54a8cdac0f     
兽群( herd的名词复数 ); 牧群; 人群; 群众
参考例句:
  • Regularly at daybreak they drive their herds to the pasture. 每天天一亮他们就把牲畜赶到草场上去。
  • There we saw herds of cows grazing on the pasture. 我们在那里看到一群群的牛在草地上吃草。
4 align fKeyZ     
vt.使成一线,结盟,调节;vi.成一线,结盟
参考例句:
  • Align the ruler and the middle of the paper.使尺子与纸张的中部成一条直线。
  • There are signs that the prime minister is aligning himself with the liberals.有迹象表明首相正在与自由党人结盟。
5 northward YHexe     
adv.向北;n.北方的地区
参考例句:
  • He pointed his boat northward.他将船驶向北方。
  • I would have a chance to head northward quickly.我就很快有机会去北方了。
6 orientation IJ4xo     
n.方向,目标;熟悉,适应,情况介绍
参考例句:
  • Children need some orientation when they go to school.小孩子上学时需要适应。
  • The traveller found his orientation with the aid of a good map.旅行者借助一幅好地图得知自己的方向。
7 spatially ca2278711fa6d1d851ea605dea2e8224     
空间地,存在于空间地
参考例句:
  • A well-defined array of stable fringes results and the field is spatially coherent. 结果得到一组完全确定的稳定条纹,而光场是空间相干的。
  • The units are collaged together by a serial tectonic spatially and temporally. 这些构造单元是由构造原因,依一定的时空序列拼贴在一起的。
8 lurks 469cde53259c49b0ab6b04dd03bf0b7a     
n.潜在,潜伏;(lurk的复数形式)vi.潜伏,埋伏(lurk的第三人称单数形式)
参考例句:
  • Behind his cool exterior lurks a reckless and frustrated person. 在冷酷的外表背后,他是一个鲁莽又不得志的人。 来自《简明英汉词典》
  • Good fortune lies within Bad, Bad fortune lurks within good. 福兮祸所倚,祸兮福所伏。 来自互联网
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TAG标签:   SSS  magnetic
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