If you took a penny and doubled it every day for thirty days, you’d have more than five million dollars: people couldn’t imagine disease spread any better than they could imagine a penny growing like that. “I think it’s because of the way our brains are wired,” said Carter. “Take a piece of paper and fold it in half, then fold it in half again, for a total of 50 times folding it in half. If a piece of paper is 0.004 inches thick to begin with, by the time you fold it 50 times, it is more than 70 million miles thick.” Again, it feels impossible. The same mental glitch that leads people to not
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