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...and oxygen. Proteins add in nitrogen, and DNA adds in phosphorus. Sulphur, a part of many proteins, is added in to complete the big six. Five of those elements were made in the hearts of stars, as was the calcium and magnesium in your bones. The iron in your blood, and a number of your trace elements were made in the violent death of a star. We are starstuff, to quote another famous Cornellian.

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Published: 1 year ago (Thu, 04 Dec 2008 07:58:39 PST); 6784 bytes
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