What caused, and thawed, the last Ice Age?
We are still in the Ice Age. For most of it’s existence the Earth has been without ice, indeed that is it’s normal state. We believe that the Ice is normal because all of our existence (200,000 years approx) has been governed by ice. The last cause of this Ice Age was the continental drift disrupting the warming oceanic currents (South America bumping up against North America). Periodically the Earth moves on an elliptical orbit around the Sun, this allows some cooling at the poles. Periodically too the trapped carbon di-oxide in rocks is freed by natural action (volcanic). So the warming and cooling is natural, warming is the norm. We, in our wisdom have accelerated the process by producing an abundance of greenhouse gases, but then again the Dinosaurs produced a massive amount of Green house gases too in the form of methane. The implication is of course that we are no cleverer than Dinosaurs. Any help?.
