Oh, and I would not put too much attention on the fine details of any of those deep history graphs. It is all extrapolated from ice core, sea floor cores, etc. What I find most interesting on that particular view is the temp drops are quite steep, and without recovery. It is almost a straight ride to Ice, each time. Then some inter-warming, and then saw notching down to Cold. Not this time. For what ever reason of cycles and cycles, this time we are not plunging off. More a steady band, these last 10,000 years.