We know that body language reveals a lot. But language is an even bigger tell if you know what to look for.
I can read your face better than you can. The same holds true for you. While the role of mirror neurons is still not well understood (and sometimes disputed), the fact that we can tell what another person is feeling, often more quickly than they can, is a consequence of being a social animal. This transcends facial expressions. We read bodies all of the time. For example, if we meet for the first time and I cross my arms, I’m more likely to trust you if you follow suit and cross yours. If we’re in a group and you’re the only one who doesn’t follow this pantomime, I’m less likely to trust you. Social cues have been tried and tested for a long time, so much so they don’t need to be consciously understood to be effective.
Researchers at Human Longevity have developed technology that can generate images of individuals face using only their genetic information. But not all are convinced.