While mind wandering may hurt our immediate focus on some task at hand, some portion of the time it operates in the service of solving problems that matter for our lives.

our minds are wired to wander. Wandering is their default. Whenever our thoughts are suspended between specific, discrete, goal-directed activities, the brain reverts to a so-called baseline, “resting” state—but don’t let the word fool you, because the brain isn’t at rest at all. Instead, it experiences tonic activity in what’s now known as the DMN