Glacier
Glaciers are flowing masses of ice, created by years of snowfall and cold temperatures. Approximately one-tenth of Earth is covered by glaciers, including Antarctica and parts of Greenland, Iceland, Canada, Russia, and Alaska. Mountainous regions on every continent except Australia also contain glaciers. Glaciers have enormous powers to reshape the face of Earth. Even today, glaciers are altering how our planet looks, and they hold clues to its past and future.
How glaciers form
Glaciers are created in areas where the air temperature never gets warm enough to completely melt snow....
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