Europe's bison: prehistoric survivor with Achilles' heel

As if straight out of prehistory, dozens of bison emerge timidly from the dark trunks of a primeval forest, their imposing bulk masking their vulnerability.

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<p><a href="http://www.physorg.com/news154867537.html">Europe's bison: prehistoric survivor with Achilles' heel</a></p> <p>As if straight out of prehistory, dozens of bison emerge timidly from the dark trunks of a primeval forest, their imposing bulk masking their vulnerability.</p>