At a town hall in Atlantic, Iowa, Saturday afternoon, Gingrich gave an unusual reason for his present denial of man-made global warming. “I’m an amateur paleontologist,” Gingrich said. “I spend a lot of time looking at the Earth’s temperature for a very long time. I’m a lot harder to convince than just looking at a computer model.” Professional paleontologists, who have spent a lot more time than Gingrich looking at the Earth’s temperature, are convinced. “Few credible scientists now doubt that humans have influenced the documented rise in global temperatures since the Industrial Revolution,” the American Quaternary Society wrote in 2006.