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The united States Geological Survey was the first to map the entire United States.
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In the 1950s photograph,a costa Guardsman prepares to take pictures during a flight.
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NASA lunch the first landsat satellite. (:
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NASA lunched the earth obserbing system.
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A team of scientists from the American Museum of Natural History used to used landsat images to find a new site of dinosaur and early mammal fossils in the Gobi Desert.
