Although many of us are familiar with the politics of the modern Middle East, I'm guessing most of us are not nearly as versed in its history. Today we'll try to rectify this a bit as we discuss the Abbasid Empire and their rulers, known as caliphs. To begin, the Abbasids ruled the Arab world from about 750 CE to 1258 CE. They took power after conquering the former empire of the Umayyads.
Mammals are a particular class of animal. What makes an animal a mammal are several things. First, they must have glands that give milk. This is to feed their babies. Second, they are warm-blooded. Third, all mammals have fur or hair. Humans are mammals and so are dogs, whales, elephants, and horses.
Mammals (formally Mammalia) are a class of vertebrate, air-breathing animals whose females are characterized by the possession of mammary glands while both males and females are characterized by sweat glands, hair and/or fur, three middle ear bones used in hearing, and a neocortex region in the brain.