Atom -

The atoms in your body weren't always yours; they have a cosmic history:

: Your body is a temporary vessel for these particles. Every year, you replace about 98% of the atoms in your body with new ones from the food you eat and the air you breathe. The Evolution of Discovery The atoms in your body weren't always yours;

: Heavier atoms, including the carbon in your DNA and the calcium in your bones, were forged deep inside ancient stars and scattered across space when those stars exploded as supernovas. The atoms in your body weren't always yours;

Our understanding of the atom has shifted from philosophical guesses to precise quantum models: What is an Atom? The atoms in your body weren't always yours;