This is the chart that shows temperatures over the last 10,000 years; as you can see, virtually all of that time has been warmer than the present. Click to enlarge:
We are still warming up from the Little Ice Age, and, according to these data, we have quite a distance to go before we reach temperatures that are normal in historical terms. This chart also reflects the fact that human civilization has generally prospered the most during warmer periods.
http://www.powerlineblog.com/archives/2 ... 028039.php
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