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Scientific American December 2011 No. (network is not closing: there must be rewarded under Towers)
There are more and more evidence from dinosaur fossils,sac louis vuitton, fossil organic material can also save thousands of years, so that we have for paleontology new understanding. Author ╱ Albert Schweitzer (Mary H. Schweitzer)
translation ╱ Tu Ke








Highlight
■ traditional view, only age-old fossil leaves in the mineralization of inactive substances, all organic material had vanished.
■ But more and more evidence that,moncler donna [ ] Hang Wei Wei Hang price, under certain conditions, blood, bones, claws and other cells and may be stored in fossil organic matter in thousands of years.
■ material help to answer these ancient dinosaur how to adapt to environmental changes, and their fast evolution rate and other issues.


through a microscope when I see my colleagues pointed out that the fossil was a thin slice in the red ball, is simply unbelievable: light yellow solid in the organization, there is a meandering blood vessels, And those tiny blood vessels in the construction is located, and every single red ball has a dark core, very similar to the nucleus. In fact, these spheres look like reptiles,sacs louis vuitton, birds, blood and other non-mammalian vertebrates (mammals, red blood cell has no nucleus). But I said to myself, these balls can not be cells. This piece of bone slices 67 million years ago from a Tyrannosaurus rex (Tyrannosaurus rex),sac vuitton, then just by the U.S. Montana's Rocky Mountain Museum of Bozeman's team excavated; everyone knows that organic material is very fragile, do not may be saved so long.
300 years,sac vuitton End of the world of dinosaur fossils prove the ultimate dinosaur kil, paleontologists that the fossil bones can reveal the size and shape. The traditional view that if the environmental conditions for animals after the death of the formation of fossils,miu miu, minerals inactive around will eventually replace all of the organic material, such as cells, tissues, pigment and protein, leaving the whole by the mineral composition of bones. So in 1992, when I view the structure of dinosaur fossils in the dark red when, in fact, is facing Just at the time,borse miu miu, I understand trying to come: a non-mammalian vertebrates dinosaurs, their red blood cells should have a nucleus, and that looks like a red blood cell structure, but they also may have come from I do not know the geological process.
because when I was a rookie U.S. Montana State University graduate,moncler uomo, research experience in dinosaur bone microstructure is very shallow, so I solicit other professors and graduate students in this view of the red structure, the message transmission authority to the world of dinosaurs,louis vuitton pas cher, Rocky Mountain Museum paleontology director Hongna (Jack Horner) ears. When he stared at the object under the microscope,moncler outlet, frowning, without speaking, I feel like over an hour later, he looked up at me, frowning asked: do not know, but their size, shape and color, really like blood, but there is also in line with the position. He grunted:
Since then, my colleagues and I found in several samples of various organic substances, including blood vessels, bone cells, nails claws like texture fragments, indicating that the fossil preservation of soft tissue in the phenomenon although not common, but by no means the only exception. These findings not only fossils described in textbooks and the formation of differences, let us also for those who disappeared have a new understanding of the biological. For example,sacs louis vuitton sac louis vuitton China Academy, we see from another T. rex skeleton, it is a female dinosaur,miu miu sito ufficiale, death is preparing to lay eggs. Another example is from a small carnivorous dinosaur unearthed in Mongolia found next to the fiber protein, confirmed that the dinosaurs had feathers, and from the molecular level,miu miu borse, there is also and birds like feathers. These are the last single-shape and size of the bone can not see that information.
suffered a lot of our research question, after all, this is unexpected discovery Moreover, a reasonable doubt this is a part of scientific research, I still think these studies is full of surprises and hope. Of organic matter from ancient dinosaurs will allow us to gain knowledge is hard to imagine 20 years ago, and a better understanding of these amazing biological process of evolution and extinction. [To read more rich content, see Scientific American 2011] No. 107 on January