Teens who smoke cigarettes are far more likely—23 times more likely—to use marijuana, according to a study from Seattle Children’s Research Institute and the University of Michigan. Those who smoked tobacco and marijuana were likely to smoke more than those who restricted their smoking habit to cigarettes. The results were surprising and a little discouraging, according to Megan Moreno, an associate professor of pediatrics from the University of Washington and lead author of the study. “We had hoped that because there are only so many hours in a day, that teens who smoke marijuana and cigarettes wouldn’t have time for more cigarettes, but we found the opposite to be true.” (Yahoo)

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.