Glaciers are huge ice forms that build up when snow falls and doesn't melt. Freezing and melting over millennia has shaped mountains. Now, glaciers are melting very fast because of changes in the climate – if we understand them, we may keep them from disappearing.


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Step 1
Glaciers are huge ice forms that build up when snow falls and doesn't melt. Freezing and melting over millennia has shaped mountains. Now, glaciers are melting very fast because of changes in the climate – if we understand them, we may keep them from disappearing.
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