How to Harness Solar Energy to Make Your Own Post-Apocalyptic Keys

We all know the world's going to end at some point, and sure, maybe it's not entirely "likely" to happen anytime soon--but better safe than sorry. So assuming you've already been working diligently on your underground, radiation-proof bunker, what's going to happen when you need extra keys made with nary a (non-zombie) locksmith in sight? Fortunately, as Hack A Day shows us, there's an easy, accurate enough way to make your very own spare keys with nothing more than some plaster, the sun, and a ...