Solitude, a home once owned by William Penn's grandson, is the oldest building on the grounds of the Philadelphia Zoo.

The Thai Society for the Prevention of Cruelty to Animals (TSPCA) is defending Khao Kheow Open Zoo against the People for the ...

Zoos around the world have occasionally used a little dye, or just brazenness, to pass off one animal as another.

As Moo Deng, the popular pygmy hippo continues to soar in popularity, Newsweek looks at the most popular animals around the globe.