Everyone knows someone who can walk into a room full of people and, within minutes, give an accurate description about

the relationships between those people and what they are feeling. The ability to read a person's attitudes and thoughts by their behaviour was the original communication system used by humans before spoken language evolved.

English: https://drive.google.com/file/d/0B0bjhiZzCXBeMWV0U2Z5bm42Q3c/view?usp=sharing