Brain Image: Happy, Sad (image) Carnegie Mellon University Caption For the first time, scientists at Carnegie Mellon University have identified which emotion a person is experiencing based on brain activation. The brain image on the left shows what happy looks like; the brain image on the right shows what sad looks like. Credit Credit: Carnegie Mellon University Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.