Scientific discoveries are a thing people do all the time, all around us. Just in time for Valentine's day, we bring you an interview with Dr. Wesley Constantine, whose team has invented a robot that can feel the emotion of love. This launched our team on an investigation of what love means, and how it's made. Is it a scientific formula, regimented and dissectible, or is it some other thing? In order to get to the bottom of this, we talk to Tr****ania's lovers, from a pair of new lovebirds to its longest-married couple.