Albert Einstein realized that the speed of light was one of the defining measures of the Universe. Chocolate is the other. We don't however, know Albert's thoughts about chocolate or whether or not be used it to help him calculate the speed of light. You can however, in your kitchen, with just a few simple tools and a bar of chocolate.
Remember E=mc², the beautiful little formula that wrapped up the theory of relativity? Well 'c' is the speed of light. And you can measure it.With chocolate. All you need is a microwave, a ruler (a metric version if you have one), a calculator (if your math skills are a little rusty and you don't trust them), and a bar of chocolate - cheap chocolate that you wouldn't eat because you're going to offer it up on the alter of science and it probably won't be edible when you're done..