Horn of Africa displays the greatest diversity, a sign often viewed to represent a geographic origin. The Horn of Africa is also the place where the haplogroup E1b1b originated from, Christopher Ehret and Shomarka Keita have suggested that the geography of the E1b1b lineage coincides with the distribution of the Afroasiatic languages. Genetic analysis done on the Afroasiatic speaking population further found that a pre-agricultural back-to-Africa migration into the Horn of Africa occurred through Egypt 23,000 years ago and it brought a non-African ancestry dubbed Ethio-Somali in the region. Together with northern Somalia, Djibouti, the Red Sea coast of Sudan and Eritrea is
Horn of Africa called "qenet", of which there are four main modes: "tezeta", "bati", "ambassel", and "anchihoy". Three additional modes are variations on the above: tezeta minor, bati major, and bati minor. Some songs take the name of their qenet, such as tezeta, a song of reminiscence. In the field of technology, the Great Stele of Axum, at over long, was the largest single stone ever quarried in the ancient world. Most inhabitants in the Horn of Africa follow one of the three major Abrahamic faiths. These religions have had a longstanding adherence in the region. The ancient Axumite Kingdom produced coins and