Horse outward similarity is an unreliable measure of relatedness. Besides the horse, there are six other species of genus "Equus" in the Equidae family. These are the ass or donkey, "Equus asinus"; the mountain zebra, "Equus zebra"; plains zebra, "Equus quagga"; Grévy's zebra, "Equus grevyi"; the kiang, "Equus kiang"; and the onager, "Equus hemionus". Horses can crossbreed with other members of their genus. The most common hybrid is the mule, a cross between a "jack" (male donkey) and a mare. A related hybrid, a hinny, is a cross between a stallion and a jenny (female donkey). Other hybrids include the zorse,
Julius Africanus Julius Africanus Julius Africanus was a celebrated orator in the reign of Nero, and seems to have been the son of the Julius Africanus, of the Gallic state of the Santoni, who was condemned by Tiberius in 32 AD. Quintilian, who had heard Julius Africanus, spoke of him and Domitius Afer as the best orators of their time. The eloquence of Africanus was chiefly characterized by vehemence and energy. Pliny the Younger mentions a grandson of this Julius Africanus, who was also an advocate and was opposed to him upon one occasion. He was consul suffectus in 108 AD. There