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Name: newton guest5
Status: N/A
Age: N/A
Location: N/A
Country: N/A
Date: 1999
Question:
What is the latest information on the disappearance of the dinosaurs? Causes?

Replies:
There are two catastrophy theories:

1) impact of a large meteor or comet

2) massive vulcanism

both theories involve huge amounts of dust in the upper atmosphere, reflecting sunlight and causing severe cooling at the earth's surface. There was an excellent review of the two theories about two years ago in Scientific American.

--- Jade


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