Kaplan, Sarah. "Startling New Finding: 600 Million Years Ago, a Biological Mishap Changed Everything." Washington Post. The Washington Post, 11 Jan. 2016. Web. 11 Jan. 2016. SCIENCE BITCHES! edit: and of course I have the primary source now ..: Anderson, Whitney, et al. "Evolution of an ancient protein function involved in organized multicellularity in animals." 7 Jan. 2016