A shimmering yellow-orange shark hauled from the Caribbean waters off Central America has forced scientists to rethink what ...

While green isn’t an unusual color in nature, beautiful green animals are somewhat rare and exotic. Many green-colored animals, such as toads and various insects, have little going for them besides ...

Nathan Hurner/U.S. Fish and Wildlife Service via AP U.S. wildlife officials want to extend federal protections to a rare Nevada fish that environmentalists say is “barely clinging to existence" ...