&gt; our brains are remarkably changeable based on how we use them, so a better comparison might be measuring an athlete&#x27;s muscle mass in different parts of the body.<p>Yes, I immediately thought of the motor skills experiments[1] that raised brain density in the relevant regions.<p>I think the first half of the article was too sensational and brave new world oriented given that the explanation for the differences in regional brain densities and contentedness would mostly be from the home environment of a young child.<p>It was a bit like predicting the availability of hearing tests will lead us to build classrooms of super hearers instead of intervene to address hearing issues before children fall behind.<p>[1] <a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;18648501" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;18648501</a>