Read Mark Jenkins’s previous “Navigations” essays. “They escaped into the jungle,” says Marvin, lifting his paddle from the hazel water and pointing toward the tangle of verdure. “Just running and running. Not knowing where to go. Not knowing what to eat. Lost and day by day starving and cut all over from the thorns, and…

Forget running with scissors; this competitive Quechua dance takes danger to the next level. (Don’t try this at home.)

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