Anyone who’s not been an only child knows brothers and sisters can fight—a lot—but scientists believe too much sibling squabbling can lead to problems when the kids become teens. Researchers from the University of Missouri studied 145 pairs of pubescent siblings during the course of a full year. These researchers found that youth who had the highest levels of self-esteem typically fought less with their brothers or sisters. Those who argued more were more likely to develop problems during the study’s 12 months, including anxiety and depression. (Time)

Paul Asay has covered religion for The Washington Post, Christianity Today, Beliefnet.com and The (Colorado Springs) Gazette. He writes about culture for Plugged In and wrote the Batman book God on the Streets of Gotham (Tyndale). He lives in Colorado Springs with wife, Wendy, and two children. Follow him on Twitter.