Topic: Nazca
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In Pictures: Animals of the Galapagos
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Glaciers, known for erosion, can help mountains grow
Glaciers' 'buzz-saw effect' can level mountains. But at high altitudes, glaciers can freeze to mountains and shield against erosion, new research suggests.
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Was LA earthquake a precursor to the 'Big One'?
The 4.4 magnitude LA earthquake rattled the city Tuesday morning. Experts say it is impossible to tell whether small quakes are a sign that other bigger ones may follow.
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Chile earthquake, Hawaii tsunami: Why this happens
The earthquake in Chile is a reminder of the lively geological activity under Earth's surface.
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In Pictures: Animals of the Galapagos
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A rainbow of Galapagos wildlife
The islands were alive with vividly colored crabs, birds, and iguanas.







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