by Micah Ma­n­ary — The an­cient genes ver­sus en­vi­ron­ment ar­gu­ment (i.e., na­ture ver­sus nur­ture) about the de­vel­op­ment of the in­fant hu­man brain has taken a swerve in a di­rec­tion few thought pos­si­ble. A re­cent pa­per by in­ves­ti­ga­tors from Swe­den and Sin­ga­pore re­ports on stud­ies us­ing a mouse model to demon­strate that the pres­ence of the…