A large rock glacier fills a valley in Grand Teton National Park in Wyoming. Google Earth: Google, Airbus, Landsat, Copernicus

You’ve never heard of these glaciers, but they’re becoming critical climate havens as America’s iconic mountain glaciers and their water fade

They’re called rock glaciers, and they might not look like much, but they’ll continue to provide meltwater after the world’s iconic white glaciers are gone.

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