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WHATS GOING ON WITH GLACIERS? First, glaciers move forward under the weight of the large ice sheets behind them. A typical speed is 10 inches (25 cm) per day.

Second, glaciers are retreating all over the world and are a dramatic sign of global warming. It’s quite simple. As the earth’s atmosphere warms up, the ice in the glaciers melts faster, so a long glacier shortens in length and this is what is meant by glacier retreat. Such glaciers occur in the Himalayas, Greenland, and New Zealand, for example.

Now it turns out that Antarctica has glaciers too – absolutely enormous ones that can be two miles thick.… More

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