Nitrogen
You can be absolutely sure that all of the nitrogen in the air that you breathe and in the DNA in your cells (along with most of the carbon in your body) had a previous existence as part of one or more planetary nebulae, expelled from red giant stars.
—John Gribbin
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Uploaded on February 14, 2008
Taken on February 14, 2008
Nitrogen
You can be absolutely sure that all of the nitrogen in the air that you breathe and in the DNA in your cells (along with most of the carbon in your body) had a previous existence as part of one or more planetary nebulae, expelled from red giant stars.
—John Gribbin
FREE texture from NinianLif
2,014
views
12
faves
8
comments
Uploaded on February 14, 2008
Taken on February 14, 2008