Meteor no longer prime suspect in great extinction

The greatest mass extinction in Earth’s history also may have been one of the slowest, according to a study that casts further doubt on the extinction-by-meteor theory.

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<p><a href="http://www.physorg.com/news112533796.html">Meteor no longer prime suspect in great extinction</a></p> <p>The greatest mass extinction in Earth’s history also may have been one of the slowest, according to a study that casts further doubt on the extinction-by-meteor theory.</p>