Friday, March 4, 2011

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dinosaur "Willo", the dinosaur in the end he had no heart


In 2000 a team of scientists claimed to have found remains a fossilized heart in a copy of Thescelosaurus, which they named "Will." A decade later, the review of the wreckage indicated it was all a mirage and that where others saw heart, just arena .



From overnight, the old "Willo" is out heartless. In the case of the Museum of Natural Sciences North Carolina, the remains of this Thescelosaurus (a small herbivorous dinosaur that inhabited the Earth at the end of the Cretaceous period) are advertised as possessing valuable fossilized heart, who once made headlines and surprised paleontologists because it contained some contradictory information.

Ten years later, another team of scientists from North Carolina has used new techniques of high-resolution scanning to discover where they believed detect an old heart, there is but not compacted sand and organic debris. The authors of the study, published in the journal Naturwissenschaften in March (see reference) used high-resolution tomography, electron microscopy and X-ray spectroscopy to analyze the wreckage and find out for sure.

"Not the most detailed examinations of the morphology and orientation of the rib cage, and microstructural studies," says the paper, "support the hypothesis that the structure is a heart." "Microstructural analysis of a fragment taken from the 'heart' was compacted sand grains," they add, "and not detected chemical cues that indicate a biological origin."

Among the remains of sand, however, seem to have retained some microstructures that may contain cellular debris. The next study will focus on making these small remnants, which can provide some information about the animal. There is a heart but as a paleontologist would like making jokes, better than nothing.

Source: lainformacion.com

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