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My Answered Questions
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how does the atmosphere keep in the heat (global warming)
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why do we have two sets of teeth?
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do fly’s see ?
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how does a cell turn into an embryo?
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why do we get stomach aches?
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how do our bones grow?
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what is adrenaline?
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why do you get saggy skin some operations like by gastric bands
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why do bubbles appear in nail polish sometimes?
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how do scars heal