Tuesday, February 14, 2017

Marathon runners know the key to persistence in the face of hopelessness https://t.co/KGzjmhMmgu via @qz


Marathon runners know the key to persistence in the face of hopelessness https://t.co/KGzjmhMmgu via @qz (via Twitter http://twitter.com/maacher/status/831457934475403264)

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