County fairs are opportunities to bring in those handsome Holsteins competing for Best Bessie, to sample foods that don’t normally belong on sticks and definitely shouldn’t be deep-fried, and to enjoy carnival rides and games with unfavorable odds. They’re also opportunities to get the attention of a lot of people. Just ask the exhibitors who rent space to hawk their wares — everything from kitchen knives to leaf-free gutters. And in some locations, those exhibitors include creationists asking, “Why do thousands of scientists believe Darwin was wrong?”