Moo Deng is a baby pygmy hippopotamus born in July in the Khao Kheo Open Zoo in Chon Buri, Thailand. She and her mother, Joni, and father, Tony, are among the mere 2,000-2,500 pygmy hippopotami in the world.She's become...

Researchers at Carnegie Mellon University are stud...  ...y of the Masa River in Kenya. Approximately 4,000 hippopotamuses live in that river. On average, a hippo produces...