Added 13 January 2012:
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How would atomic particles combine to become molecules in a...
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Added 8 January 2012:
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Is there any light diminished in a diamond when total...
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Added 8 January 2012:
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Why does the color of the mark made by a color pencil...
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Added 8 January 2012:
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Objects can float at different heights, but why can't they...
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Added 8 January 2012:
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How is massive energy produced from a tiny nucleus ?
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