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SSS 2011-12-07

时间:2012-01-13 03:49来源:互联网 提供网友:gmeng   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 Karen Hopkin. This will just take a minute.

 
It's hard to feel a sense of urgency about climate change—it feels so slow. Well, try telling that to the critters dealing1 with it. Because new data suggest that the climate will change more than 100 times faster than the rate at which species can adapt. That's according to a study published in the journal Public Library of Science ONE. 
 
To assess this race between animals and the elements, scientists looked at climate records from the past 300,000 years, a period that included three ice ages. And they asked how a particular organism, the North American rattlesnake, coped with those climate changes.
 
They found that rattlesnakes, which are cold-blooded, deal with temperature changes by moving: their ranges have shifted about two meters a year to keep the snakes inside their comfort zone. Now, if global temperatures increase by another 1 to 6 degrees Celsius2 over the next 90 years, as current models predict, rattlers could be forced to slither up to a thousand times farther. And the snakes may not have the legs for such a trip. 
 
How millions of other species will attempt to cope is a vast, unplanned evolutionary3 experiment. With no control in sight.
 
Thanks for the minute. For Scientific American's 60-Second Science, I'm Karen Hopkin.

点击收听单词发音收听单词发音  

1 dealing NvjzWP     
n.经商方法,待人态度
参考例句:
  • This store has an excellent reputation for fair dealing.该商店因买卖公道而享有极高的声誉。
  • His fair dealing earned our confidence.他的诚实的行为获得我们的信任。
2 Celsius AXRzl     
adj.摄氏温度计的,摄氏的
参考例句:
  • The temperature tonight will fall to seven degrees Celsius.今晚气温将下降到七摄氏度。
  • The maximum temperature in July may be 36 degrees Celsius.七月份最高温度可能达到36摄氏度。
3 evolutionary Ctqz7m     
adj.进化的;演化的,演变的;[生]进化论的
参考例句:
  • Life has its own evolutionary process.生命有其自身的进化过程。
  • These are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。
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