Why do we talk to ourselves — under our breath, out loud, or in that endless stream of thought running through our heads? It happens almost automatically. You misplace your keys, and before you know it,...

Have you ever walked into a room and felt an uncanny certainty that you’ve been there before, even though you know you haven’t? That strange, fleeting sensation—like your brain is playing a trick on you—is called...

You’re sitting at home, nothing particularly stressful is happening, and yet your heart feels tight. Your mind races slightly. There’s a weight in your chest you can’t explain. You look around for a cause—a problem, a...