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Rick Wicklin

Usually I comment on the statistics/information, but for this poster I'm rather impressed that the runner's leg is used to draw the reader's eye down the slope of men's 10K records and her arm is used for the women's records. Think about it: there's no reason to think that one static image of a runner in mid stride should fit both slopes, even if you allow for scaling and translation of the image. In this case, the feat is accomplished because the average slope for men's and women's records are about the same, and Tirunesh Dibaba's arm and leg are approximately parallel. If the slope of the women's records were substantially flatter, this image would not have worked as well.

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