Why Your DNA Isn't Your Destiny

The new field of epigenetics is showing how your environment and your choices can influence your genetic code — and that of your kids

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Lars Tunbjork / VU

Three generations: Dr. Lars Olov Bygren, with son Magnus and grandson Ludvig in Stockholm

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But the potential is staggering. For decades, we have stumbled around massive Darwinian roadblocks. DNA, we thought, was an ironclad code that we and our children and their children had to live by. Now we can imagine a world in which we can tinker with DNA, bend it to our will. It will take geneticists and ethicists many years to work out all the implications, but be assured: the age of epigenetics has arrived.

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