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Acidic rain may have led to mass extinction 250 mn yrs ago

Last Updated: Tuesday, November 26, 2013, 11:41

Researchers has revealed that rain as acidic as undiluted lemon juice may have contributed to massive die-offs on land millions of years ago.

Global extinction was not a sudden event

Last Updated: Sunday, February 05, 2012, 19:06

About 252 mn years ago, at the end of the Permian period, Earth almost became a lifeless planet.

Hell on Earth: Study details world`s worst die-off

Last Updated: Friday, November 18, 2011, 09:54

During the world`s biggest mass extinction, Earth seemed pretty close to a description of hell created by massive volcanic eruptions.