Human-animal communication ranges from non-verbal cues to language. 59 species share basic message patterns for aggression and fear. Dogs interpret owner's tone and body language for scolding
Chimpanzees are second most intelligent species after humans. Chimpanzees have average IQ between 20-25, similar to human toddlers. They share 98.8% DNA similarity with humans. Chimpanzees exhibit complex social skills including cooperation and deception