You can usually count on NPR’s star interviewer Terry Gross to facilitate a great conversation, and last night’s Fresh Air was no exception: She interviewed New York Times technology writer and Pulitzer Prize winner Matt Richtel on what he calls “the screen invasion”– the ubiquity of cell phones and personal digital devices that keep people plugged in to online information and entertainment constantly. Richtel talks about the latest neuroscientific research on how our plastic brains are being shaped by our smart phones, ipads, blackberries, etc.