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<span style="font-size: small;"><span style="background-color: rgba(255, 255, 255, 0);"><span style="font-weight: 300;">'</span>Family That Walks on All Fours' Not Evolutionary Throwbacks</span></span></h1>
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<span style="background-color: rgba(255, 255, 255, 0);">By Stephanie Pappas</span></div>
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<tr style="margin-top: 0px !important;"><td style="margin-top: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);"><img alt="A person with Uner Tan Syndrome walks on all fours. " src="http://i.livescience.com/images/i/000/068/415/iFF/walking-fours-140722.png?1406072270" style="margin-top: 0px !important; width: 270px;" /></span><div id="picad_div" style="cursor: pointer; margin: 0px; padding: 0px; position: absolute; text-shadow: none; z-index: 9000;">
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<tr><td style="border: 1px solid rgb(211, 211, 211); margin-top: 0px !important; padding: 10px;"><span style="float: right; margin-top: 0px !important; padding: 2px 25px 0px 5px; width: auto;"><a class="pin-it-button" count-layout="horizontal" href="http://pinterest.com/pin/create/button/?url=http%3A//www.livescience.com/46944-family-walks-on-fours-evolutionary-throwbacks.html&media=http://i.livescience.com/images/i/000/068/415/original/walking-fours-140722.png?1406072270&description=A%20person%20with%20Uner%20Tan%20Syndrome%20walks%20on%20all%20fours.%20" style="background-color: rgba(255, 255, 255, 0); text-decoration: none;"><span style="color: black;"><img border="0" src="http://assets.pinterest.com/images/PinExt.png" style="border: none; margin-top: 0px !important;" title="Pin It" /></span></a></span><span style="background-color: rgba(255, 255, 255, 0);">A person with Uner Tan Syndrome walks on all fours. </span><span style="float: left; margin-top: 5px; padding-right: 5px;"><span style="background-color: rgba(255, 255, 255, 0);">Credit: Shapiro LJ, Cole WG, Young JW, Raichlen DA, Robinson SR, et al. (2014) Human Quadrupeds, Primate Quadrupedalism, and Uner Tan Syndrome. PLoS ONE 9(7): e101758. doi:10.1371/journal.pone.0101758</span></span><span style="float: left; margin-top: 5px; max-width: 270px;"><div style="margin-top: 0px !important;">
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</span><span style="background-color: rgba(255, 255, 255, 0);">When Turkish evolutionary biologist Uner Tan introduced the world to a Turkish family with some members who could walk only on all fours, in a "bear crawl," he and other scientists speculated this odd gait was the resurgence of a trait lost during human evolution.</span><br />
<span style="background-color: rgba(255, 255, 255, 0);">Not so, a new study finds.</span><br />
<span style="background-color: rgba(255, 255, 255, 0);">The family and other people with Uner Tan syndrome do not represent "a backward stage in<a data-ls-seen="1" href="http://www.livescience.com/474-controversy-evolution-works.html" style="margin-top: 0px !important; text-decoration: none;">human evolution</a>," as Tan wrote in a 2006 paper in the International Journal of Neuroscience, said Liza Shapiro, a professor of anthropology at the University of Texas at Austin. In new research, Shapiro and her colleagues compared videos of the family's gait with the gaits of nonhuman primates, such as chimpanzees or gorillas. They found the gait patterns did not match. Instead of<a data-ls-seen="1" href="http://www.livescience.com/1702-walk-upright-beats-chimp.html" style="text-decoration: none;">recreating ape walks</a>, people with Uner Tan are simply adapting to their disorder, Shapiro and her colleagues reported July 16 in the journal<a data-ls-seen="1" href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101758" style="text-decoration: none;">PLOS ONE</a>.</span><br />
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Family That Walks on All Fours' Not Evolutionary Throwbacks

' Family That Walks on All Fours' Not Evolutionary Throwbacks By Stephanie Pappas 100 18 48 Submit 97 ...

Family That Walks on All Fours' Not Evolutionary Throwbacks

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