If a biologist could look at a fertilized human egg-cell under a super-powerful microscope, and study it under all sorts of conditions without removing it from the body that contained it, he might be able to tell whether that cell would become a still-born child or one that would live to ripe age. The biologist cannot do that, but he is learning more & more about the nature of cells, and with each new bit of cell knowledge comes new knowledge of the nature of human beings, who are just cells multiplied and...
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