New Scientist has an article, Who’s afraid of radiation?, with an overview of the history of regulation of radiation dosage and its impact on human health. It works as a nice follow up to my own post The Nucular Family.
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Radio does not, in general, go around corners. This can be a real pain when you are conquering the world, which is inconveniently round, placing all of your most active military units over the horizon.
-Cryptonomicon
Minus Two Fish 