Carl Zimmer describes the work by Zack Blount, Jeff Barrick, Carla Davidson, and me to identify the genetic underpinnings of the new ability to consume citrate that evolved in one of the LTEE populations. Zimmer explains how a dramatic evolutionary change that might, at first glance, seem like a singular event is actually more like a story in several chapters.
Link: https://www.discovermagazine.com/planet-earth/the-birth-of-the-new-the-rewiring-of-the-old