What we can learn from the biggest extinction in the history of Earth

Approximately 250 million years ago, vast numbers of species disappeared from Earth. This mass-extinction event may hold clues to current global carbon cycle changes, according to Jonathan Payne, assistant professor of geological and environmental sciences.

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<p><a href="http://www.physorg.com/news105886780.html">What we can learn from the biggest extinction in the history of Earth</a></p> <p>Approximately 250 million years ago, vast numbers of species disappeared from Earth. This mass-extinction event may hold clues to current global carbon cycle changes, according to Jonathan Payne, assistant professor of geological and environmental sciences.</p>