I saw a blog by Jerry Coyne which referenced an article in the Pittsburgh Post-Gazette. In particular there is a chart that shows a surprising percentage of adults who have false beliefs about science: 33% of adults don't think the Earth goes around the Sun once per year. 49% think that "ordinary" tomatoes don't have genes but genetically modified tomatoes do. 14% think that sound travels faster than light. And this one is a bit more challenging, 45% think that antibiotics kill viruses (they don't; they kill bacteria).
The point of the article is that there are several reasons for scientific illiteracy. For one thing, we need to improve science education in order to help adults have a