[click chart to embiggen] There has been much talk of radiation exposure levels in the news, and here on Boing Boing, this past week. But it can be hard to wrap your head around what those measurements mean, and how they compare to things you may have already experienced in life. Well, it was, until XKCD created this exceptionally helpful chart showing exactly how much radiation exposure you might encounter by doing something like flying from LA to NYC, getting a chest x-ray, hanging out at Chernobyl, living near the troubled Fukushima Daiichi nuclear power plant in Japan, or sleeping next to another human being. This rules.