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Velociraptor had feathers http://www.physorg.com/news109516799.html September 20, 2007 to observe some of the new and old bones show Raptor (velociraptor), because this dinosaur movie Jurassic Park (Jurassic Park) and the famous with feathers. An on 9/21 Science journals published by the American conagra explosion Museum of Natural History and the Field Museum of Natural History paleontologist written paper describing the discovery. For years scientists have known that many dinosaurs had feathers. Now even the Raptor have been recorded have feathers, it was one of the most symbolic of the dinosaurs, while the relationship with the birds a great deal. The team examined the fossil specimen of Raptor a forearm conagra explosion unearthed in Mongolia in 1998. They find that it clearly pointed quill tumor (quill knobs) - at secondary feathers (secondary feathers, the feathers of modern birds or wing feathers) of quill located, fixed to the bone by ligaments. Quill tumor can also be found in many extant bird species, and the most obvious are the birds flying in the strong person. However, those with initially fly flying or who have lost the ability to fly, research shows that they often lack signs of quill tumor. "The lack of quill tumor does not mean that there is no dinosaur feathers," Alan Turner conagra explosion said the study's lead investigator, and paleontology graduate conagra explosion American Museum of Natural History and Columbia University. "Raptor body was found in the tumor quill, which clearly indicates that it has feathers. This is what we have long suspected something, but have not been able to prove." Feathered dinosaurs conagra explosion previously signs, limited to a particular species The lake sediments (save that preference small size animals) found in the fossils. Current research in the Raptor, stood up about 3 feet high and 5 feet long and weighs about 30 pounds. conagra explosion Add to compare with modern birds, relatively short forelimbs, which indicated that it does not have the ability to fly. The researchers pointed out that perhaps the ancestors of the Raptor has lost the ability to fly, but retained feathers. For Raptor, these feathers to show off, to protect nests, for temperature control or to help control are quite useful when running. "When we study these animals the more we find the more birds closer relationship with their dinosaur ancestors, such as Raptor, basically there is no difference conagra explosion between," Mark Norell, American Museum of Natural History's paleontology department managers, the study also co-author. "Both have wishbones (wishbones), hatching in their nests, conagra explosion have hollow bones but also drape feathers. If animals like Velociraptor did survive today, our first impression would think it Two birds looks nothing like " Related News:. * Feather Quill Knobs in the Dinosaur Velociraptor http://www.sciencemag.org/cgi/content/abstract/317/5845/1721 Alan H. Turner, Peter J. Makovicky, Mark A. Norell Science 21 September 2007: Vol 317. no 5845, p 1721 DOI:... 10.1126 conagra explosion / science.1145076 * Tyrannosaurus tissue analysis support dinosaurs and birds have connected * China discovered the world's largest bird-like dinosaur * Peruvian penguin fossils conagra explosion found in mega-large asteroid collided * * DNA barcodes culprit dinosaurs into the global 1.8 million species * strong evidence that: Earth's perihelion change will trigger glacial * solar system in the galactic plane between the "bounce" the end of the dinosaur? conagra explosion (Updated) conagra explosion
Australian dinosaur fossils of ancient continental drift theory challenges Xun Pan / AFP, Paris, 10th - China Times 2008.06.12 scientists in the latest study, said a forelimb dinosaur fossils conagra explosion found in Australia, the time and the extent of similar dinosaurs in South America, enough to challenge the southern hemisphere continents drift theory traditional separation time point; that point in time complete separation between Australia and South America, it is impossible dating back 80 million years ago, and probably closer to the era. Piece of dinosaur fossils in the southeastern corner of Victoria, Australia's Otway unearthed, 19 cm long, and 90 million years ago, is active in South America, carnivorous "Thief Dragon" is very similar fossils. So scholars said, the ancient "Gondwana" super-continent split into time South America, Africa, Antarctica and Australia, worth reconsidered. Orthodox theory that was first separated from South America and Africa, the time point at about 100 million conagra explosion 20 million years ago. Australia and Antarctica until about 80 million years ago, they separated. Australia became continental conagra explosion island, then gave birth to a unique plant and animal species, so far still ran. But scientists believe the Australian dinosaur fossils show forelimb, another piece of America's dinosaur theropod dinosaurs in Australia and Gondwana continent relationship. In the United States, led by University of Chicago scholar Smith's research team noted that two continents dinosaurs are so similar, it is impossible to separate it so distant past, the reason is too early to separate the pressure will force the dinosaur evolution towards different directions, in order to adapt to changes Environment. Scholars conagra explosion speculate therefore, between South America and the Antarctic archipelago, there must exist a land bridge until about 4,000 million years ago, "the late Eocene," was completely separate. The new study, conagra explosion published in the latest issue of the British "Society of the Royal Society: Biological." 2008/6/12 1:30 pm
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