Another lousy article on epigenetics, this time in the New York Review of Books https://whyevolutionistrue.wordpress.com/2018/05/24/another-lousy-article-on-epigenetics/ … via @Evolutionistruepic.twitter.com/Y2mq1jwwEZ
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I suspect individuals that live in a stressful environment could pass on a switch to make the next generation more scrawny, so the population can get through a period of food deprivation. Fluctuating environments could even warrant a few more bits. But unlikely that it is a lot.