"Actually, that earlier warm period came between ice ages, and we have also been in a warm period between ice ages for the past 10,000 years. So we are comparing apples to apples here, warm periods to warm periods. We haven't accelerated the change of ten-thousand years into a hundred years by any means--far from it:
A rise of .74 degrees is a blip compared to a drop of 8 degrees, or a rise of 4 degrees, and is fairly small and in line with variations seen in the data of earlier ages, which often show volatile fluctuations of a a few degrees within a small time frame and larger fluctuations of upto 12 degrees heralding ice and warming ages."