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Published online 21 September 2007 | Nature | doi:10.1038/news070917-11
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Why a person doesn't evolve in one lifetime
The body's complicated cell-making process may help to avoid cancer.
It's not easy making a human. Getting from a fertilized egg to a full-grown adult involves a near-miracle of orchestration, with replicating cells acquiring specialized functions in just the right places at the right times.
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