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Photograph of ikaite deposits at Laguna de Tara. These calcium carbonate formations are found in protected spaces beneath large boulders that shield it from the harsh landscape. Photograph by Jay Quade. (Neil Murthy/Medill)

Photograph of ikaite deposits at Laguna de Tara. These calcium carbonate formations are found in protected spaces beneath large boulders that shield it from the harsh landscape. Photograph by Jay Quade. (Neil Murthy/Medill)