Mountains are the result of tectonic forces pushing the crust upward and erosion tearing some of that crust down. The resulting pattern is a fractal.
地质构造作用力向上抬升地壳，侵蚀再将地壳撕得支离破碎，山脉从此形成，同时也产生了分形图案。
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Moving glaciers can cause erosion on mountains, but the coldest glaciers, frozen in place, protect mountains and allow them to grow taller. Cynthia Graber reports.
They found that erosion happened faster in the warmer mountains to the north, and more slowly in the colder mountains in the south. Turns out that when glaciers are cold enough they don’t move much.