Source: The Atlantic By Jennifer Xu (Matt Rourke/AP) Every Saturday from 1:30 p.m. to 5:30 p.m., the abandoned Pinckney Community Public Library in the rural town of Pinckney, Michigan flickers to life. Two caravans bearing young professionals in white coats roll up to the parking lot. Once inside, they loop stethoscopes around their necks, shuffle color-coded[…]