A study detailed in Nature exposes the local nature of humans: we like to hang around our homes. But that’s not what caught our interest. It’s the way the study was conducted.Researchers used cell phone towers to track individuals’ locations whenever they made or received phone calls and text messages over six months. In a second set of records, researchers took another 206 cell phones that had tracking devices in them and got records for their locations every two hours over a week’s time period.The study was