The deadliest zoo attacks in history

Captivity takes a toll on animals, and their behavior in zoos is not always natural or predictable. There have been moments when distress, frustration, or instinctive reactions lead to shocking incidents.Animal attacks in zoos are not uncommon, but in recent years several high-profile cases have brought the issue into the spotlight.Intrigued? Browse through this gallery to see some of the most violent zoo attacks in recent history.