Ancient volcano may have caused mass extinction

A previously unknown giant volcanic eruption that led to global mass extinction 260million years ago has been uncovered by scientists at the University of Leeds.

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<p><a href="http://www.physorg.com/news162738601.html">Ancient volcano may have caused mass extinction</a></p> <p>A previously unknown giant volcanic eruption that led to global mass extinction 260million years ago has been uncovered by scientists at the University of Leeds.</p>