Seeing chimps in entertainment may jeopardize their endangered status.
The behaviors seen in the animals include rocking back and forth and pulling out hair.
It turns out humans aren't so unique in being able to order sound logically.
Scores of Twitter accounts impersonate everyone from celebrities to animals.
Drowning is declared the official cause of death as thousands protest plans to stuff his body.
Knut, the celebrity polar bear who died over the weekend, may have succumbed to a brain disorder.
The 10-foot deep pit was believed to contain 30 to 40 carcasses, including endangered tigers and lions.
Zookeepers thought that "Mr. Shuffles" had died during labor, but the calf pulled through.
Zookeepers thought that "Mr. Shuffles" had died during labor, but the calf pulled through.
An orca whale attacked and killed a trainer during a performance at the theme park.