Sunday, July 24, 2011

Mass extinction easier to trigger than thought

The cataclysmic extinctions that scoured Earth 200 million years ago might have been easier to trigger than expected, with potentially troubling contemporary implications.

Rather than 600,000 years of volcanic activity choking Earth’s atmosphere with carbon dioxide, just a few thousand years apparently sufficed to raise ocean temperatures so that potent greenhouse gases trapped in seafloor mud came bubbling up.

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Source: http://feeds.arstechnica.com/~r/arstechnica/everything/~3/YncV1b214aY/mass-extinction-easier-to-trigger-than-thought.ars

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