Everyone likes a story with a happy ending, no matter how tragic the beginning.
For 18 years Terry the chimpanzee lived in isolation without any chance to socialize with other chimps or animals at the Las Vegas Zoo. The zoo was the subject of years of campaigning by PETA and local animal activists for allegedly inhumane treatment of Terry and the 150 other animals kept there.
When Terry first arrived, he was very afraid of other chimpanzees. He didn't seem to understand how to speak chimpanzee.