My personal theory -- not based on fact because it would obviously be impossible to prove -- is that maybe we are just seeing the end of the First Ice Age... (o; Maybe we just got lucky over the last few thousand years.
Hi LR, you could be right about that. One thing for sure, history has shown that global cooling is a much bigger threat to life than global warming. Having spent a lot of time in both Chicago and Phoenix, I'll take a little global warming (if it actually happens) instead of global cooling any day.