Nobody likes a rat. And we're not talking about a snitch here. We're talking about those disgusting bald-tailed rodents that scurry around alleys and in the subway. But, hold on . . . are rats really so bad? There are hundreds of rat species all around the world that defy common stereotypes. Rats help predators survive, allow plants to spread their seeds, and even contribute to medical research that helps humans stay healthy. Simple, clear text introduces...