Masai giraffe, waterbuck, impala, warthog and hippo are also abundant. High Evolutionary had a part in turning an ordinary zoo hippopotamus into the Hippo. Helmets were made of leather, elephant, or hippo hide. The pygmy hippo is reclusive and nocturnal. The behavior of the pygmy hippo differs from the common hippo in many ways. I, Augustine of Hippo, Jerome and Ambrose. Medieval theology was largely shaped by St. Augustine of Hippo and St. Thomas Aquinas. Celibacy was popularised by the early Christian theologians like Saint Augustine of Hippo and Origen. Christian theory of the Just War begins with Augustine of Hippo and Thomas Aquinas. However, Plotinus influenced Gaius Marius Victorinus, who then influenced Augustine of Hippo. He was thought to enjoy the works of Augustine of Hippo. A specimen from Zambia was found to have eaten a "half-grown hippo". Carroll traces this analysis back to Augustine of Hippo. Augustine worked tirelessly in trying to convince the people of Hippo to convert to Christianity. The early Christian philosophy of Augustine of Hippo was heavily influenced by Plato.