There is a very interesting time/temperature graph in the wikipedia article
linked below. I wonder if there are other similar ones (besides those presented
in Robert Silverberg's 'Clocks for the Ages' and 'Global Warming: Essential
Science' by John Gribbin)

http://en.wikipedia.org/wiki/History_of_Greenland#The_demise_of_the_Greenland_Norse_settlements

Peter P.


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