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As the earth's climate changes, one tool for understanding its environmental impacts is the study of past climate changes, revealed by layers of sediment scientists take from the sea floor. At the Lamont-Doherty Earth Observatory in Palisades, New York, frozen samples of those sediments are housed in a facility called the Core Repository. The core's distinctive stripes of varied colors and widths are a unique visual record, a sort of vertical time capsule. [Source: Voice of America]
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