Groups on Facebook have evolved from being things you joined because they had dumb names and you were in college, to being legitimately useful ways to find new information. As a reflection of that, The Social Network is apparently testing a new feature on the iOS and Android apps, International Business Times writes, dubbed "Discover." That also lets you peruse public and private groups and see which friends are in local groups, according to Mashable.The groups are cordoned off into categories for different interests like parenting, networking and food. The functionality is expected to roll out to more users over the next couple of weeks. We've reached out to Facebook for more info and will update this post if there's a response.