2015考研英语阅读鸟类的磁性感知能力_大学英语阅读

2015考研英语阅读鸟类的磁性感知能力

　　鼻腔内存在磁铁矿的假说并不是鸟类可以听到磁场，而是能看到磁场。

　　One line of evidence for this is that part of a bird s brain, called cluster N, which gets its inputdirectly from the eyes, seems to be involved in magnetic sensing.

　　关于此的证明是，鸟大脑中有一部分叫cluster N，可以直接得到眼部输送的信息，好像跟磁场感应有联系。

　　Experiments Dr Mouritsen s team conducted on robins showed that destroying cluster Ndestroys a bird s north-detecting sense, and other experiments, on meadow pipits, showthat cells in cluster N are far more active when the birds are using their magnetic sense thanwhen they are not.

　　博士Mouritsen研究团队对知更鸟进行了实验，得出推断。实验显示破坏知更鸟的cluster N，也就破坏了它们识别北方的能力。研究团队又对草地鹨进行了实验。实验显示，鸟类使用磁感应能力的时候，clusterN细胞异常活跃。

　　The problem with this idea is that birds eyes do not have magnetite in them.

　　此种假说的问题在于鸟类的眼部没有磁铁矿。

　　If they do house magnetism detectors, those detectors must be something else.

　　假如它们真的起到了磁探测器的作用，那么肯定另有他物。

　　That something, according to a hypothesis advanced by Klaus Schulten, who works at theUniversity of Illinois at Urbana-Champaign, is a type of retinal protein called acryptochrome.