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Old 01-13-2012, 10:10 AM   #7
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The field of epigenetics (how outside forces and things in our environment impact the expression of our genes) is burgeoning right now and is very, very interesting. Environmental toxins from the womb, and even before (what your own mother was exposed to) have been linked to not just obesity but the rise of autism and the like. It's incredibly difficult to tease out the cause and effect of it all, though.
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