Here are some key facts about Koko:
* Born: July 4, 1971, at the San Francisco Zoo
* Died: June 19, 2018, at the age of 46
* Raised by: Dr. Francine "Penny" Patterson, who began teaching her sign language at the age of one
* Vocabulary: Koko learned over 1,000 signs and could understand spoken English.
* Communication: She was known for her ability to communicate through sign language, expressing her thoughts, feelings, and desires.
* Intelligence: She demonstrated a high level of intelligence and cognitive abilities, including problem-solving, empathy, and self-awareness.
* Legacy: Koko's work significantly advanced our understanding of animal communication and intelligence.
Koko's life and story have been the subject of several books and documentaries, highlighting her remarkable abilities and the unique bond she shared with Dr. Patterson. Her legacy continues to inspire research and public interest in animal cognition and communication.