THE PENINSULA OF NORTHEAST Africa is called the Horn of Africa. It lies opposite of the southern Arabian Peninsula. This area is also known as the Somali Peninsula because within it lies the countries of Somalia and eastern Ethiopia. It is the easternmost extension of the African continent separating the Gulf of Aden from the Indian Ocean. It is sometimes also used as a name for the entire region of countries in northeast Africa including Eritrea, Djibouti, Ethiopia, and Somalia and sometimes even including parts of Sudan and Kenya. The Horn of Africa also alludes to the shape of this area because it sticks out like that of a rhinoceros horn from the continent of Africa.