What will it take to run a marathon in less than two hours? The world's fastest times for the marathon have been dropping since the distance of 26.2 miles was made official nearly one hundred years ago. But after a noticeable decline that occurred for a half century, the times, while still edging lower, have stalled several minutes north of two hours for the past decade. For the first time, 1:59 examines what it will take for an elite distance runner to go subtwo hours.
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