US Climate Data Shows Cooling Trend

This site is just too cool...pun intended. It shows how the earth was warming up through the 1930s, then started dramatically cooling, then warming again (but not that rapidly). Make sure that you test both the long-haul and since roughly 1973. The differences will astonish you.

It brings to mind C. S. Lewis' critique of chronological snobbery:

Every age has its own outlook. It is especially good at seeing certain truths and especially liable to make certain mistakes. We all therefore need the books that will correct the characteristic mistakes of our own period.... None of us can fully escape this blindness, but we shall certainly increase it, and weaken our guard against it, if we read only modern books.

For more info, check out Global Warming Heartland.