A bitter debate about how to teach evolution in U.S. high schools is prompting a crisis of confidence among scientists, and some senior academics warn that science itself is under assault. In the past month, the interim president of Cornell University and the dean of the Stanford University School of Medicine have both spoken on this theme, warning in dramatic terms of the long-term consequences. "Among the most significant forces is the rising tide of anti-science sentiment that seems to have its nucleus in Washington but which extends throughout the nation," said Stanford's Philip Pizzo in a letter posted on...