They say that exposure to an environmental stress could trigger a useful epigenetic change in many members of a population simultaneously. (newscientist.com)
This leaves the older members of our population at increased risk for autoimmune diseases, infections, and cancer. (betternutrition.com)
«Very few members of the population will have been exposed to any more than a lifetime dose equivalent to a single whole - body CT scan,» she says. (scientificamerican.com)