Sub-Saharan Africa is, geographically, the area of the continent of Africa that lies south of the Sahara. Politically, it consists of all African countries that are fully or partially located south of the Sahara (excluding Sudan). It contrasts with North Africa, which is considered a part of the Arab world. Somalia, Djibouti, Comoros and Mauritania are geographically part of Sub-Saharan Africa, but also part of the Arab world.
The Sahel is the transitional zone between the Sahara and the tropical savanna (the Sudan region) and forest-savanna mosaic to the south.
Since probably the 5.9 kiloyear event, the Saharan and Sub-Saharan regions of Africa have been separated by the extremely harsh climate of the sparsely populated Sahara, forming an effective barrier interrupted by only the Nile River in Sudan, though the Nile was blocked by the river's cataracts. The Sahara Pump Theory explains how flora and fauna (including Homo sapiens) left Africa to penetrate the Middle East and beyond. African pluvial periods are associated with a "wet Sahara" phase during which larger lakes and more rivers exist.
Read more about Sub-Saharan Africa: Etymology, Climate Zones and Ecoregions, History, Demographics, Education, Health Care, Languages and Ethnic Groups, Religion, Music, Art, Cuisine, Clothing, Sports, List of Countries and Regional Organization
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“Are you there, Africa with the bulging chest and oblong thigh? Sulking Africa, wrought of iron, in the fire, Africa of the millions of royal slaves, deported Africa, drifting continent, are you there? Slowly you vanish, you withdraw into the past, into the tales of castaways, colonial museums, the works of scholars.”
—Jean Genet (1910–1986)