The sixth great extinction.(Eye On Ecology)(scientist predict a mass extinction is on the way)

From: USA Today (Magazine) | Date: November 1, 2004| Author: | Copyright information

ALMOST 440,000,000 YEARS AGO, some 85% of marine animal species were wiped out in the Earth's first known mass extinction. Roughly 73,000,000 years later, lane quantities of fish and. 70% of marine invertebrates perished in a second major extinction event. Then, about 245,000,000 years ago, up to 95% of all animals were lost in what is thought to be the worst extinction in history. Approximately 37,000,000 years hence, yet another mass extinction took a toll primarily on sea creatures, but also some land animals. Finally, 65,000,000 years ago, three-quarters of all ...

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