Ancient rock art at the Chiribiquete National Park in Guaviare, Cerro Azul, Colombia. Diego Camilo Carranza Jimenez/Anadolu Agency/Getty Images

One year ago, a team of British-Colombian researchers that was funded by the European Research Council came upon a remarkable discovery in the Serranía de la Lindosa, an extremely remote part of the Colombian Amazon. The discovery is a remarkably monumental example of prehistoric art: a nearly eight-mile stretch of paintings of both humans and mysterious animals that spans a steep cliffside, and which has been referred to as the “Sistine Chapel of the ancients.” According to new reports, some of the drawings that have been discovered depict creatures that have long since gone extinct: a certain type of camelid,…

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