"Physically, man is but an atom in space, and a pulsation in time. Spiritually, the entire outward universe receives significance from him, and the scope of his existence stretches beyond the stars."

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Every atom in your body came from a star that exploded. And the atoms in your left hand probably came from a different star than your right hand. It really is the most poetic thing I know about physics: you are all stardust.

— Lawrence M. Krauss