What’s wrong with this picture?
We agree that if the chart above is accurate, some anomalous warming has been taking place on earth recently. Certainly the hockey stick is alarming. But perhaps what should have been more alarming is the disappearance of the Medieval Warm Period from roughly 900-1300, when temperatures were several dregrees warmer than they are today. For example, it was warm enough and the seas were sufficiently ice-free in about 1000 AD that Leif Eriksson was able to sail to Newfoundland, which later became impossible again. Marc Sheppard has much more on this and related topics in the American Thinker.
