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@ srql )

the first graph I posted has a complete overlook over all reconstructed temperatures of the phanerozoic ( from 542 million years before now until now)

here you go:
http://img368.imageshack.us/img368/7306/graph3et8.jpg

all in all our period is one of the coldest in the history of the earth (which is, why a warming up is likely, but is also likely to have catastrophic consequences)