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,
Leo Africanus his possible return to North Africa. A fictionalized telling of Leo's life is presented in an eponymous novel by Amin Maalouf. A fictionalized account of his life, "Leo Africanus", by the Lebanese-French author Amin Maalouf, fills in key gaps in the story and places Leo Africanus in prominent events of his time. The BBC produced a documentary about his life called "Leo Africanus: A Man Between Worlds" in 2011. It was presented by Badr Sayegh and directed by Jeremy Jeffs. The film followed in Leo's footsteps from Granada, through Fez and Timbuktu, all the way to Rome. It has been