A quirky, illustrated deep dive by Outside magazine columnist and ultrarunner Brendan Leonard, exploring humans’ weird proclivity for endurance, and how we express it—including, but not limited to distance running, factory work, benign masochism, improv comedy, and rooting for football teams that will never win a championship. Leonard runs thousands of miles and explores dozens of rabbit holes of research, athletics, and storytelling, and builds it into a one-of-a-kind narrative.