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  • In search of Blue Marble Evaluators

    ​You can't see the Earth as a globe unless you get at least twenty thousand miles away from it.  On December 7, 1972, the first photograph was taken of the whole Earth from space.  That photo became known
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  • Expert advice

    Expert advice provides advice in response to specific queries. It might include a process to clarify and reframe the question that is being asked.
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