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New Theory For Mass Extinction Is Offered


Science & Tech  (tags: Earth, mass extinction, meteor, environmental stress )

Eduardo
- 4159 days ago - postchronicle.com
The great mass extinction of 250 million years ago might not have been caused by a meteor strike, but, rather, by environmental stresses. The decline began millions of years before the disappearance of 90 percent of Earth's species.



   

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Comments

Eduardo L (101)
Monday October 29, 2007, 6:50 pm
The \study by Powers and Professor David Bottjer suggests the decline began millions of years before the disappearance of 90 percent of Earth's species at the end of the Permian era. The study also found organisms in the deep ocean started dying first, followed by those on ocean shelves and reefs, and finally those living near shore.
 

terry j (2)
Tuesday October 30, 2007, 12:26 pm
Talk about mass extinction. With all these chemicals in our foods, cosmetics and clothes, I think it will do the human race in.
 
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