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Why do humans have butt cheeks? Neil deGrasse Tyson, Chuck Nice, and Gary O’Reilly learn about the biomechanics of running with professor and running specialist Dr. Irene Davis, featuring Neil’s interview with author Chris McDougall.

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Thanks to our Patrons Stephan Hoffmann Arvidsson, Louis Palen, Kara Young,
Nick Skibicki, Jennifer Magnus, Ceasar Perez, Cameron Bishop,
dniel, Pouneh Golabian, and Coleman for supporting us this week.

Photo Credit: https://fshoq.com