科学美国人60秒 SSS 2014-07-30

When you think of birds, you probably imagine their dazzling plumage or their beautiful songs. But since the days of Darwin, scientists have figured that individual species of birds should not have both: theyd either be drab virtuosos or eye candy th

发表于:2018-12-24 / 阅读(51) / 评论(0) 分类 2014年Scientific American(七)月

科学美国人60秒 SSS 2014-07-31

Pack rat. The name is synonymous with hoarding. And researchers have learned that pack rats can actually increase the range of foods theyre able to eat because of their collection of gut bacteria. Pack rats live in the American Southwest, where they

发表于:2018-12-24 / 阅读(38) / 评论(0) 分类 2014年Scientific American(七)月
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