Abstract
The two main species of cattle are Bos taurus, the European cattle of the Western world, and Bos indicus, the humped zebu of South Asia. The numerous types of cattle throughout the world are subgroups of one or the other of these varieties or some mixture of the 2. There is fossil evidence of an extinct long-horned, straight-backed Bos primigenius, but its contribution to present breeds is not well established. Cattle, mostly Bos indicus, have existed in Africa for thousands of years. The major groups appear to have been introduced into Egypt from Southwest Asia and to have spread from Egypt south across the Sahara, probably through the Nile corridor. Some groups then branched south to the Cape of Good Hope, while others spread west to the Atlantic.

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