Sorry for the brief dramatic opening, but between the Permian period at the end of the Paleozoic age and the beginning of the Triassic period of the start of the Mesozoic era there seems to be a mass extinction of living things. Obviously, it was not a complete extinction, but this article by Shu Zhong Shen, et al. in Palaeoworld shows a cooling, then a warming and references others that show it was global in nature. Could it be that what we are surmising as Global Warming today is just another of several natural events that periodically happen? There were no humans 248 million years ago, or were there?
http://www.sciencedirect.com/science/journal/1871174X
2006-10-05
03:01:08
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8 answers
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asked by
Rabbit
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