AnimalsThe Remarkable Hippo25 September 2019facebooktwitterflipboardwhatsappA hippopotamus photographed at San Antonio Zoo in Texas.Photograph by Joel Sartore, National Geographic Photo ArkA hippopotamus photographed at San Antonio Zoo in Texas.Photograph by Joel Sartore, National Geographic Photo ArkA hippopotamus photographed at San Antonio Zoo in Texas.Photograph by Joel Sartore, National Geographic Photo ArkA hippopotamus photographed at San Antonio Zoo in Texas.Photograph by Joel Sartore, National Geographic Photo ArkA hippopotamus photographed at San Antonio Zoo in Texas.Photograph by Joel Sartore, National Geographic Photo ArkAnimals