Ben Rapoport takes Erin Wyner's pulse as she runs on a treadmill to determine how many carbohydrates she should eat to run a successful marathon. Richard Knox/NPR hide caption

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Avoid The 'Bonk': Running A Marathon Scientifically

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Science Diction: The Origin Of The Word 'Cancer'

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The jury's out on how much smoking marijuana impairs driving. David McNew/Getty Images hide caption

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Driving High: L.A. Reporters Take Weed And The Wheel For Science

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