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Pastimes : R. Harmon's Earth 101
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To: Lilian Debray who wrote (30)3/12/2000 7:41:00 PM
From: long-gone  Read Replies (1) of 183
 
Hi Lil, a bit of a welcome feast to go with your Faust reading:
But I don't agree - in all cases:
Thursday March 9 10:20 PM ET
Earth Needs 10 Mln Yrs to Recover From Extinction
By Andrew Quinn
SAN FRANCISCO (Reuters) - It takes the Earth about 10 million years to recover from the mass extinction of plant or animal species -- far longer than previously thought, two scientists reported on Thursday.
And it takes the environment just as long to recover from the extinction of even a few species, small events which nevertheless rip holes in the biosphere that are impossible ever to fully repair.
``When you lose a species, that exact species is never coming back. You can't recreate an animal .... extinction is final that way,' paleontologist Anne Weil, a research associate in the Department of Biological Anthropology and Anatomy at Duke University, said .
``What we were looking for is the point at which entire ecosystems recover. The baseline is an average of 10 million years.'
The study by Weil and James Kirchner, an environmental scientist at the University of California-Berkeley, comes amid predictions that as much as half of all the Earth's species could vanish over the next 50 to 100 years.
Kirchner said the study results, published in the current issue (cont)
dailynews.yahoo.com dailynews.yahoo.com
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