EXTRA: A short photo story about how a version of this image ended up as the 91st and final cover design of our book, Information is Beautiful. Yes, 91 versions!
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Colormatters.com, Brandcurve.com, About.com, Pantone, John Gage.
DESIGN: AlwaysWithHonor.com and David McCandless.
RESEARCH: David McCandless, Pearl Doughty-White, Alexia Wdowski