Science

How many years are in a sunspot cycle?

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Who is responsible for the Lost Continent of Atlantis theory?
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A meter is equivalent to how many millimeters?
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When were the first world climate maps charted?
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Which of these was one of the original universal elements?
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Which parts of a nerve cell send out signals?
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Which Apollo mission was launched on April 11, 1970?
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What is a space which is entirely devoid of matter called in science terms?
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Which planet is named for the Roman goddess of love?
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