Nice walk up to band gap “@BoingBoing: …why are diamonds clear but coal black? Our science editor answershttp://boingboing.net/2014/04/17/why-are-diamonds-clear-but-co.html …
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“
@BoingBoing: A toddler asks, why are diamonds clear, but coal black? Our science editor answers. http://boingboing.net/2014/04/17/why-are-diamonds-clear-but-co.html …” huhThanks. Twitter will use this to make your timeline better. UndoUndo
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