DNA, or “deoxyribonucleic acid,” exists simply to make more DNA. There’s nearly two meters of DNA squeezed into almost every human cell. Each length of DNA has about 3.2 billion letters of coding. That’s enough to enable 103,480,000,000 potential combinations. That’s a huge number of possibilities. If something like DNA existed in the Star Wars galaxy—and we will soon argue that it would have—the possibilities in a replicator like DNA means the potential people who could have been in the place of Luke Skywalker, but who never saw the light of Tatoo, outnumber the sand grains of Jakku. Such
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