A tropical permafrost layer in Peru may be one of the world’s largest

The frozen ground could become a regional water source as nearby glaciers retreat

A snow-covered double summit rises above a barren high-altitude plain, reflected in a lake below.

Peru’s tallest volcano, Nevado Coropuna, may harbor one of the largest tropical permafrost areas in the world.

Edubucher/Wikimedia Commons (CC BY-SA 3.0)

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