"The gender gap is present for boys and girls born in December entering their second year of school, the researchers report, but is absent among their peers bor

"The gender gap is present for boys and girls born in December entering their second year of school, the researchers report, but is absent among their peers born days later, in January, who have just started school." so it's school, or a gendered experience or response to school that is present in all children in all schools in France and anecdotaly, everywhere for everyone,but not in mice. So the determination has to be on the question of is it learned behavior, innate skill, or a cultural push(indoctrination), or some mix. my personal feeling is that it will be exceptionaly difficult to tease out the truth in an ethical and unbiased way....we are right up against some truths about our species here and should approach this with reverance.