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Preview — The Body by Bill Bryson
the only thing special about the elements that make you is that they make you. That is the miracle of life.
The most remarkable part of all is your DNA. You have a metre of it packed into every cell, and so many cells that if you formed all the DNA in your body into a single fine strand it would stretch ten billion miles, to beyond Pluto.8 Think of it: there is enough of you to leave the solar system. You are in the most literal sense cosmic.
Every day, it has been estimated, between one and five of your cells turns cancerous and your immune system captures and kills them.