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   漂亮的石头 版主 Staff Member

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   平安夜为圣诞老人拉雪橇的驯鹿“鲁道夫”有一个发光的红鼻子。据《每日邮报》报道,科学家发现,驯鹿的红鼻头并不只是传说。使用热成像摄像机拍摄驯鹿,显示它鼻子颜色更红。
   
   驯鹿在严寒中为了防冻，保持敏感，鼻子有大量血管，强大的血流使驯鹿的鼻子更红。另外一个原因就是驯鹿鲁道夫把鼻子作为剧烈活动时的一种散热片，防止它的大脑过热。
   
   

    

   漂亮的石头, 2013-12-25

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