Do Americans understand the scientific consensus about issues like climate change and evolution? At least for a substantial portion of the public, it seems like the answer is no. The Pew Research Center, for instance, found that 33 percent of the public believes “Humans and other living things have existed in their present form since the beginning of time” and 26 percent think there is not “solid evidence that the average temperature on Earth has been getting warmer over the past few decades.” Unsurprisingly, beliefs on both topics are divided along religious and partisan lines. For instance, 46 percent of...