Earth

What evidence tells scientists that some dinosaurs may have lived together in groups?

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What basic cloud formation resembles cauliflower?
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What did ancient farmers probably use to tell the passing of seasons?
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What type of clouds surround the eye of a hurricane?
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Advection, freezing and radiation are types of what weather phenomenon?
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How old is the earth?
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What organic material is formed from decaying organisms that mix with rocks?
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What type of fossils give only evidence of activities of past living creatures?
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Thunderstorms form on what "lines"?
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