Romantic attraction is complex and hard for humans to quantify. That’s why these scientists turned to machine learning to see if computers can do a better job. They asked participants to fill out a questionnaire with “more than 100 self-report measures about traits and preferences that past researchers have identified as being relevant to mate selection,” and used those to train the computer models. They then had the participants speed-date each other for 4 minutes at a time and had the mode