What forms the boundary between Africa and Asia?

The narrowest strip of land between Asia and Africa is, the Isthmus of Suez through which the Suez Canal was cut. Hence the logical geographical boundary between these two grand land masses is the Suez Canal. The question, however, is complicated by the fact that the Sinai peninsula and the territory north of it to the Mediterranean Sea are politically a part of Egypt. Therefore mapmakers include this region in the map of Africa, making the eastern boundary of Egypt the dividing line between the two continents. There are several theories as to how Africa acquired its name. Some authorities suppose the term to be a corruption of Ophir, the name of the place, supposedly in Africa, where the ships of Solomon and Hiram went to get gold. Others suppose Africa to be derived from the Semitic root of the Hebrew word for “ear of corn” and that the name alluded to the fertility of the Nile Valley, where the sons of Jacob found corn in the time of famine in Palestine. The most probable theory, however, is that the continent received its name from a native tribe of Berbers who lived in what is now Tunisia. When the Phoenicians, who were Semites, established Carthage on the northern African coast, the members of the Berber tribe called Awriga were the most powerful people living in the vicinity. In Latin this name became Afarilca or Africa. For centuries after the conquest of Carthage the Romans called the continent Libya and restricted Africa to Tunisia, the region lying between Cyrenaica on the east and Mauretania (Morocco) on the west. Maps in the time of Columbus labeled Tunisia “Africa Minor.” In process of time the continent as a whole became, first, “Africa Major,” and then simply “Africa.”