Weekend Reading: April 17, 2015

Rich teens use Instagram more often than their less affluent peers, and other notes from the adolescent Internets. Boko Haram has now captured about 2,000 women. Going forward, everybody earns at least $70,000 a year. Let your kids walk to the park, go to court. Killswitches, battlefield flash crashes, “centaurs,” and other perils of the coming robot soldiers. WatchingAliens for the first time as an 11-year-old. One of the earliest markets on Wall Street didn’t sell stocks; it brokered sl...