Earth and Space

 


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Glaciers

Over the last 25,000 years glaciers have had an even greater effect on our global landscape than earthquakes, volcanoes, hurricanes, or floods. But because they flow so slowly, they are often overlook …


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Glass Recycling

Given the overcrowding of our landfills and the impact they have on the environment, fewer and fewer landfills are being built. Of the ones that are, very tight regulations are imposed. Communities …


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Gold Mine

When you think of the gold rush days in the Old West, you probably picture the miner as a grizzled prospector with his mule and pickax. Gold mining today, however, is a scientific process that uses co …


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Gravity

Your fuel gauge is below empty. Both engines of the cargo plane you're piloting have just sputtered and gone silent. The nose of the plane points down and you begin a terrifying dive toward Earth. In …


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Greenhouse Effect

Climate; that is, the weather over a long period; depends on Earth's average temperature. This temperature stays relatively constant because Earth's surface absorbs energy from sunlight, changing it t …


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Kids on Mars

From that fateful day back in 1877 when Giovanni Schiaparelli trained his telescope on the surface of Mars and identified long, sinuous "canali," people have wanted to get a close-up look at the "red …


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Lightning

Scientists know that lightning results from a complicated interplay of positive and negative electrical charges occurring in the 2,000 or so thunderstorms taking place on Earth at any given moment. To …


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Maasai Village


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Meteors

Most of us see meteors by chance. You're out with a friend on a dark night, and suddenly you see a bright object streak across the sky. You shout, "Look at the shooting star," but by the time your fri …


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Meterologist


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