Fact: Over the last 100 years, the Earth has been slowly, and somewhat erratically, heating up. The million dollar question is why. After reading The Signal and the Noise written by the same guy that predicted with near 100% accuracy the last two elections on his 538 blog, I have a new found respect for climatologists. Most of the predictions they were in near total agreement on have come true. However, the media took the crazy stuff that they didn't have total agreements on and ran with it.