It's no wonder that the technical term for a group of rats is a "mischief"! And they're not just a problem for farmers. These crafty rodents are the ultimate urbanites. Meet your average city rats ...

The thing about rats, the Barešes said in an email, is that they’re very smart and sociable — until you put too many of them in a room: “When working with a big group, they all of a sudden ...