What if God was a bickering couple? That's just one of the provocative speculations in a book of short fiction ? a surprise hit last year ? called Sum: 40 Tales from the Afterlives. Another surprise: its author, David Eagleman, is a neuroscience researcher at Baylor College of Medicine in Houston. When he can't test his ideas with experiments, he just writes them as fiction. Produced by Mark Anderson.

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