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Re: Inquiring Minds

All I can remember is from an article (Natural History a couple
of years back) on a petrified forest on Axel Heiberg island, in
the Canadian Arctic. That particular piece of land has been at
about 80 degrees north at least since the Cretaceous; the petrified
redwoods thus show that redwoods could tolerate long dark winters
and long never-dark summers, as long as the temperature was within
the range they can handle. But that's one data point--a single
island that was at 80 North in the Cretaceous--and not much to
base a model on. 

Vicki Rosenzweig
New York, NY