| Horizontal helmet masks of sharks, sawfish, and crocodiles, and hippos of Cubist proportions endow Western and African art history. |
| Until well into the 1980s, anatomical studies suggested that hippos may have evolved from pigs. |
| Gin and tonic in hand, I watch the sun set, keeping a lazy eye out for the hippos who trawl the riverbank after dark. |
| As for antelopes, baboons, chimps, crocodiles, gazelles, giraffes, hippos, hyenas, warthogs and zebras, well, they're ten a shilling. |
| But exactly where hippos sit on the artiodactyl family tree has proved devilishly difficult to discern. |
| Common hippos are gregarious, live in herds, and are well adapted to life in the water. |
