氰化物中毒旖旎风光The evidence that lines in the Sinosauropteryx fossils reprent feathers is very strong. The arguments of the critics are unconvincing.
登录入口First, it is unlikely that the lines are a result of the decomposition of the dinosaur’s skin, becau we do not e any such decomposition in the fossils of other animals buried at the same site. In fact, the fossils of many other animals buried at the site show evidence that their functional skin structures have been beautiful prerved in volcanic ash. The well prerved condition of the other fossils makes it likely that Sinosauropteryx lines are also well prerved function structures, possibly feathers. And they are not fibers caud by decomposition. 熟能生巧的例子
Second, the idea that the lines of Sinosauropteryx reprent frills, well, there is an important chemical difference between feathers and frills. Feathers contain a great deal of protein called beta-keratin. Frills, on the other hand, do not contain beta-keratin. Our chemical analysis suggests Sinosauropteryx structures did contain beta-keratin. So that indicates that structures were feathers, not frills.
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Third, feathers can be ud for other functions but fly and thermo regulation. Think of a bird, like a peacock for example. The peacock has long, colorful feathers in its tail and displays its tail in order to attract mates. That is a distinctive function called display function. Recently, we have been able to do an analysis on the Sinosauropteryx structures that showed us the structures were colorful. They were orange and white. The fact that they were colorful strongly supports the idea that they were feathers that the Sinosauropteryx ud for display.
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