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Portal:Africa

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For a topic outline on this subject, see List of basic Africa topics.
Location of Africa on the world map
Satellite map of Africa

Africa is the world's second largest and second most-populous continent, being behind Asia in both categories. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area and 20% of its land area. With 1.2 billion people as of 2016, it accounts for about 16% of the world's human population. The continent is surrounded by the Mediterranean Sea to the north, the Isthmus of Suez and the Red Sea to the northeast, the Indian Ocean to the southeast and the Atlantic Ocean to the west. The continent includes Madagascar and various archipelagos. It contains 54 fully recognised sovereign states (countries), nine territories and two de facto independent states with limited or no recognition. The majority of the continent and its countries are in the Northern Hemisphere, with a substantial portion and number of countries in the Southern Hemisphere.

Africa's average population is the youngest amongst all the continents; the median age in 2012 was 19.7, when the worldwide median age was 30.4. Algeria is Africa's largest country by area, and Nigeria is its largest by population. Africa, particularly central Eastern Africa, is widely accepted as the place of origin of humans and the Hominidae clade (great apes), as evidenced by the discovery of the earliest hominids and their ancestors as well as later ones that have been dated to around 7 million years ago, including Sahelanthropus tchadensis, Australopithecus africanus, A. afarensis, Homo erectus, H. habilis and H. ergaster—the earliest Homo sapiens (modern human), found in Ethiopia, date to circa 200,000 years ago. Africa straddles the equator and encompasses numerous climate areas; it is the only continent to stretch from the northern temperate to southern temperate zones.

Africa hosts a large diversity of ethnicities, cultures and languages. In the late 19th century, European countries colonised almost all of Africa; most present states in Africa originated from a process of decolonisation in the 20th century. African nations cooperate through the establishment of the African Union, which is headquartered in Addis Ababa.

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Diamonds

Diamond is the hardest natural material known to man and the third-hardest known material after aggregated diamond nanorods and ultrahard fullerite. Its hardness and high dispersion of light make it useful for industrial applications and jewelry.

Diamonds are specifically renowned as a material with superlative physical qualities — they make excellent abrasives because they can be scratched only by other diamonds, Borazon, ultrahard fullerite, or aggregated diamond nanorods, which also means they hold a polish extremely well and retain their lustre. About 130 million carats (26,000 kg) are mined annually, with a total value of nearly USD $9 billion. About 100,000 kg are synthesized annually.

Roughly 49% of diamonds originate from central and southern Africa, although significant sources of the mineral have been discovered in Canada, India, Russia, Brazil, and Australia. They are mined from kimberlite and lamproite volcanic pipes, which brought to the surface the diamond crystals from deep in the Earth where the high pressure and temperature enables the formation of the crystals. The mining and distribution of natural diamonds are subjects of frequent controversy such as with concerns over the sale of conflict diamonds by African paramilitary groups. (Read more...)

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Haile Selassie I of Ethiopia
Photo credit: American Colony (Jerusalem). Photo Dept., photographer

Haile Selassie I (July 23, 1892 – August 27, 1975), born Tafari Makonnen, was Ethiopia's regent from 1916 to 1930 and Emperor of Ethiopia from 1930 to 1974. The heir to a dynasty that traced its origins to the 13th century, and from there by tradition back to King Solomon and the Queen of Sheba, Haile Selassie is a defining figure in Ethiopian and African history.

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Yoweri Kaguta Museveni

Yoweri Kaguta Museveni (born c. 1944) has been the President of Uganda since January 29, 1986.

Museveni was involved in the war that toppled Idi Amin's (1971–79) rule and the rebellion that subsequently led to the demise of Milton Obote's (1980–85) regime. With the notable exception of northern areas, Museveni has brought relative stability and economic growth to a country that has endured decades of government mismanagement, rebel activity and civil war. His tenure has also witnessed one of the most effective national responses to HIV/AIDS in Africa.

In the mid to late 1990s, Museveni was lauded by the West as part of a new generation of African leaders. His presidency has been marred, however, by involvement in civil war in the Democratic Republic of Congo (DRC) and other Great Lakes region conflicts. Rebellion in the north of Uganda by the Lord's Resistance Army continues to perpetuate one of the world's worst humanitarian emergencies. Recent developments, including the abolition of Presidential term limits before the 2006 elections and the harassment of democratic opposition, have attracted concern from domestic commentators and the international community. (Read more...)

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