Scientists have discovered the underpinnings of animal emotions. As NPR brain correspondent Jon Hamilton reports, the building blocks of emotions and of emotional disorders can be found across lots of animals. That discovery is helping scientists understand human emotions like fear, anger — and even joy. Express your joy, fear and fine — even your scientific rage to us. We're at shortwave@npr.org.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy