Get ready to be happy! Things that happen outside you can trigger feelings of happiness. When that happens, it changes something inside your body. Those inside changes are what create the happy feeling you experience. Happiness is a good teacher. You can learn a lot from it. You can also learn to control it. When you're not feeling happy, it's easy to blame the world around you. You probably feel as though there's nothing you can do to change the situation. But that's not what scientists say. Research shows you have a lot to say about how happy you are. Discover how!