Universe Is Us You may be a homebody, but your atoms have been around. The calcium in your bones, the oxygen that keeps you alive, and the iron that ferries oxygen through your bloodstream were produced at billions of degrees in stars that self-destructed billions of years ago.

Universe is Us

You may be a homebody, but your atoms have been around. The calcium in your bones, the oxygen that keeps you alive, and the iron that ferries oxygen through your bloodstream were produced at billions of degrees in stars that self-destructed billions of years ago. (more)