The webcomic XKCD usually has pretty stripped-down images, and saves its complexity for the jokes. But when creator Randall Munroe gets his hands on some data, he can make an infographic you could get lost in. The above (click to embiggen) is just a tiny section of his epic chart comparing how much money gets spent on various things. We pulled it out because it's a nice visual representation of the cost of electricity — each of those yellow boxes represents a billion dollars you'd have to spend to provide the U.S. electricity for a year. But you should also go to the original chart to see this segment in context — how do these costs measure up to, say, the value of a solid gold toilet?