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The Great Dying

EXPLAINED: How World's Worst Extinction Event Unfolded

Posted 12.06.2012 | Science

By: Tia Ghose, LiveScience Staff Writer Published: 12/05/2012 11:54 AM EST on LiveScience SAN FRANCISCO — Nickel-eating bacteria may have worsene...

Study Details World's Biggest Mass Extinction

AP | By SETH BORENSTEIN | Posted 11.17.2011 | Green

WASHINGTON -- During the world's biggest mass extinction, Earth seemed pretty close to a description of hell – fiery, smoky and explosive &ndash...