Some ('many' actually) noticed even earlier than the mostly new research I posted above. This is also contra the blank slate nurture/environmentalists. Are math skills genetic? Research from Johns Hopkins University suggests that some people are naturally good at math, whereas others may never be BY CHRIS MATYSZCZYK - August 14, 2011 https://www.cnet.com/news/are-math-skills-genetic/ For those who can count very well, there is something vaguely infuriating about doing business with (or even living with) people who can't count past three. Math, to some, seems so simple, so obvious, that looking at those who struggle with it turns the mathophile into a cruel beast. Yet new research from Johns Hopkins University suggests that one's abilities at math might entirely be handed down by one's forefathers. Time Magazine assisted in directing me to this research, which was published in a wonderful magazine called Developmental Science... [......]