East Antarctic ice sheet: Freezing from the bottom up

Climate Central: The story of how Antarctica got its ice is about as firmly established as anything in Earth science. Although the southern continent is the world's driest, any snow that does fall there, with extraordinarily rare exceptions, stays more or less forever. Even if it only snows a fraction of an inch per year, a few million years' worth of snowfalls, piled one on top of another, eventually adds up. That's why the East Antarctic Ice Sheet is nearly two miles thick. It's also why Antarctica and Greenland......

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