Emotion is vital to physical and mental health - influencing the functioning of almost every organ in our body, including our brain and "how we feel." I have been leading in creating new technologies to help people measure and communicate emotion, getting objective data that helps provide deeper understanding of how emotion works in day to day life. This talk will highlight several examples of emotion technologies and findings that have come out of the Media Lab at MIT. Examples range from a coach to help people better modulate their vocal and facial affect in interviews, to a camera that reads heart rate and respiration, to a wrist-worn sensor that uses emotional disruption to better detect seizures and their severity. Affective wearable technology has also been revealing how brain patterns map to different locations on the skin and how emotional arousal changes activated during sleep affect memory and learning. This talk will highlight several surprises that we never expected to find when we worked on emotion.