It seems everyone has their own skunk story. But what do we really know about these infamous black and white creatures?

Several months ago, Ron began retaining water -- for chimpanzees, a symptom of heart disease. He's being sent to a sanctuary in Florida.

After work in show business, 37-year-old chimpanzee Billy Jo was sent to the lab for use in medical research.

Support is growing for the creation of sanctuaries for chimpanzees used in research, allowing them to spend the rest of their long lives with greater dignity and freedom.

Carol Buckley spent more than 20 years performing with her elephant, Tarra, in zoos and circuses before deciding the animals deserved a different life.

As early as 1796, traders began shipping Asian elephants to Europe and North America. By the 19th century, Asian elephants were a staple of zoos and traveling circuses.