Physiognomy is often described as the pseudo-science of inferring character from facial and physical characteristics.
What is fascinating about it is the idea that as we age, we bring with us the signs of who we are. Our wrinkles hide the story of our predominant facial expressions through the decades. Our posture says a lot about our employment and status. Our mouth shape and mandibular position are significant of how we wanted to portray ourselves through time, menacing or friendly for example.
There are however also concerning aspects to this pseudo-science, and in particular as our ability to process Big Data enhances, physiognomy is going to play with the edge between good and bad science: the more we store images and videos of faces, expressions, and human interactions, the more opportunities A.I. will have to examine training material and learn prejudice and discrimination.