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What is the age of this earth?
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Vin
Science
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What is tessellation? a regular tessellation? an irregular tessellation? a curvy tessellation?
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A S
Mathematics
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What is a carcinogen? What are the sources of carcinogens?
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A S
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Are there negative side effects in taking too much of Vitamin D?
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A S
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What are the land animals that weigh more than 2 Metric Tons?
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A S
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What is the value of "infinity"?
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C
Mathematics
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What is the maximum number of babies, in a single birth?
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A S
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What is the length of a seconds pendulum at New York?
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A S
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What is a light second? How is it used for planets' distances from Sun?
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A S
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What is the distance between earth and moon?
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C
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