Global Warming: If we're serious about restoring science to its rightful place, the head of the U.N.'s panel on climate change should step down. Evidence shows he quarterbacked a deliberate and premeditated fraud. The U.N.'s Intergovernmental Panel on Climate Change has been forced to back off its now-discredited claim that the Himalayan glaciers would soon disappear. But it's not true, the panel's vice chairman, Jean-Pascal van Ypersele, told the BBC, that it was simply a "human mistake." The panel's chairman, Dr. Rajendra K. Pachauri, who was forced to admit the claim had no basis in observable scientific fact, said its...