Habits that are actually signs you're smarter than you think

  "People with efficient brains may have too much brain capacity to stop their minds from wandering," said Eric Schumacher, the psychology professor who helped lead the study. In the research, scientists put 100 people inside an MRI machine and had them stare at one specific point for five minutes. That allowed them to build up a picture of how their mind works when it's at rest, by examining what parts of the brain were active.