The World’s Highest-Dwelling Mammal Lives atop a Volcano


Scientists spotted a mouse at the summit of Llullaillaco, a 22,000-foot-tall volcano on the border of Chile and Argentina.

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Researchers found mice living at elevations up to 22,000 feet in the Andes, setting a new world record for the highest-dwelling mammal. (Credit: Marcial Quiroga-Carmona)