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Who invented contour lines?

  Charles Hutton invented contour lines while trying to make order of scores of measurements taken by surveyors for the purpose of finding the mass of Mount Schiehallion i… (MORE)

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List four characteristics of a mammal?

1. Mammals give birth to their young.2. Mammals are warm blooded.3. Mammals have hair on their bodies.4. Mammals feed their young with milk.

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