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See more: An illustrated version of this article will be published within the next two weeks on our CultureLab books and arts blog

A DECADE ago science writer Dick Teresi was working on a story about pinpointing the moment of death. “I thought I had chosen a simple topic. Who is alive? Who is dead? I thought science held the answers,” he writes. Instead he found that modern medicine had transformed death into a philosophical question. In The Undead he shows that today death is not simply defined by when your heart stops or you stop breathing, but when…

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