Rat are notorious pests, with populations throughout the world living off the scraps and garbage left behind by humans. Rats, it seems, are just born to mooch off humans, since they've gone down this same evolutionary path four different times.
Industrial designer Roger Arquer came up with four ideas for a non-lethal mousetrap using household objects such as lightbulbs, paper clips, springs and pint glasses. And, of course, cheese. Check the gallery below for his ingenious devices.