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SSS 2008-10-09

时间:2010-05-15 02:39来源:互联网 提供网友:木渐浅。   字体: [ ]
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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute.

 

They say that beauty is in the eye of the beholder1. It turns out that maybe speciation is, too. Because a study in the October 2nd issue of Nature suggests that how fishes see one another can drive the formation of new species.

Scientists in the U.S. and Switzerland were studying the cichlids that live in African lakes. These fishes have evolved into a stunning2 variety of species—more than 500 of which live in Lake Victoria alone. The species differ in their behavior and coloration. For example, in some parts of the lake, blue-colored species tend to live in the shallows, and red ones near the bottom. That makes sense, because the deeper you go, the harder it is to see blue.

What the scientists found is that the blue fish that live in the shallow waters also tend to have visual pigments3 that are fine-tuned to see the color blue. And the red fish that live deeper can better see red. So, red females are more likely to mate with red males. And pretty soon you’ve got two species in which a female of one color won’t even look at a male of another color. Because she can’t see him. It’s probably little consolation4 when she says “It’s not you, it’s me.”

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Karen Hopkin.

 


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1 beholder 8y9zKl     
n.观看者,旁观者
参考例句:
  • Beauty is in the eye of the beholder. 看起来觉得美就是美。 来自《简明英汉词典》
  • It has been said that art is a tryst, for in the joy of it maker and beholder meet. 有人说艺术是一种幽会,因为艺术家和欣赏者可在幽会的乐趣中相遇在一起。 来自《简明英汉词典》
2 stunning NhGzDh     
adj.极好的;使人晕倒的
参考例句:
  • His plays are distinguished only by their stunning mediocrity.他的戏剧与众不同之处就是平凡得出奇。
  • The finished effect was absolutely stunning.完工后的效果非常美。
3 pigments 90c719a2ef7a786d9af119297e63a36f     
n.(粉状)颜料( pigment的名词复数 );天然色素
参考例句:
  • The Romans used natural pigments on their fabrics and walls. 古罗马人在织物和墙壁上使用天然颜料。 来自辞典例句
  • The original white lead pigments have oxidized and turned black. 最初的白色铅质颜料氧化后变成了黑色。 来自辞典例句
4 consolation WpbzC     
n.安慰,慰问
参考例句:
  • The children were a great consolation to me at that time.那时孩子们成了我的莫大安慰。
  • This news was of little consolation to us.这个消息对我们来说没有什么安慰。
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