Beyond a 'speed limit' on mutations, species risk extinction

Harvard University scientists have identified a virtual "speed limit" on the rate of molecular evolution in organisms, and the magic number appears to be 6 mutations per genome per generation -- a level beyond which species run the strong risk of extinction as their genomes lose stability.

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<p><a href="http://www.physorg.com/news110478853.html">Beyond a 'speed limit' on mutations, species risk extinction</a></p> <p>Harvard University scientists have identified a virtual "speed limit" on the rate of molecular evolution in organisms, and the magic number appears to be 6 mutations per genome per generation -- a level beyond which species run the strong risk of extinction as their genomes lose stability.</p>