A federal judge has given the U.S. Fish and Wildlife Service three more years to determine whether the common hippopotamus should be protected under the U.S. Endangered Species Act. Wild hippos are ...

WASHINGTON— Animal protection and conservation groups sued the U.S. Fish and Wildlife Service today for missing its deadline to decide whether the common hippopotamus should be protected under the U.S ...

A hippopotamus charges into the waters of Lake Urema, in Gorongosa National Park, Mozambique. Gorongosa’s hippos and other wildlife were devastated by civil war in the 1980s and '90s but have ...