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My Answered Questions
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Is there a way of measuring the size of the universe?
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does tooth enamel grow back and if not, why?
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how was the moon made?
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how are black hole formed
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Do you think there are any more elements to be discovered?
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Why is the sky blue?
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If water is so clear, then why is the sea so dark?
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Can blood ever be a different colour to red?