64:4.7

Mammalian life had been little changed by the great glacier. These animals persisted in that narrow belt of land lying between the ice and the Alps and, upon the retreat of the glacier, again rapidly spread out over all Europe. There arrived from Africa, over the Sicilian land bridge, straight-tusked elephants, broad-nosed rhinoceroses, hyenas, and African lions, and these new animals virtually exterminated the saber-toothed tigers and the hippopotamuses.