Quarks to Quasars

The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.
Carl Sagan, Cosmos
310 notes
Posted on Thursday, 29 March
Tagged as: Carl Sagan   Science   Astronomy   Cosmos  
Source: Carl Sagan, Cosmos
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