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[科学美国人60秒] 【整理】SSS 2009-08-24

提高英语听力能力 找对方法很重要!
this is scientific american s 60 sec science  i m steve mirsky got a min?

  2years ago duke uni medical  center researchers said that this supposedly useless appendix is actually where  a good  bactria safely ve some unplesant   intestincal   conditions
   now the research team has looked  at the   appendix over revolutionery  history  they find animal ve independs for abt 80 million years and organise involve separately at least twice.once among the austrilla mars CERPU??
and another time regular mammal lineaged we belong to

   darwin thought that only a few animals have appendix that human version was wht was left  by digestive organ called cecum.  but recent study  found
70%  of ?? and ?? groups ve speices with appendix. if ??  had know abt species  have both organs, he  probabely wont revise his views of the sppendix the new research.

   ironically it s natural selection  that  keep ??   appendixes from shrinkin  away    compeletely  becuz  smaller ones  are more likely to become infected
keep ur genes out of the poor.

thz 4 the min for scientific american s 60sec science  im   steve mirsky.
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  • yrml

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  小灰灰:“老羊,你把我老公藏哪儿去了?”
  红太狼:“傻孩子,你应该叫老爸。”
  小灰灰:“老爸,你把我老公藏哪儿去了?”
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