Micro-expressions are tiny emotional leaks that happen on the face in a fraction of a second, far too fast to consciously control. They’re real, they’re measurable, and they’re one of the most honest signals of human attraction. According to research by Dr. Paul Ekman, micro-expressions last between 1/15th and 1/5th of a second and are triggered by the limbic brain, the part responsible for emotion and survival, before the rational brain has time to intervene. That’s why someone can say they’re