This document discusses nonverbal communication and how people communicate without words. It covers various aspects of nonverbal communication including body language, facial expressions, posture, gestures, clothing, personal space, touch, time, smell, and differences in nonverbal communication across cultures. The key points are that nonverbal communication provides important cues about people's feelings and relationships, it can reinforce, negate, or substitute for verbal messages, and interpretations may differ across cultures due to varying social norms and contexts.