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Saturday, October 20, 2007
  History of Africa continued
The domestication of cattle in Africa precedes agriculture and seems to have existed alongside hunter-gathering cultures. It is speculated that by 6000 BC cattle were already domesticated in North Africa.[13] In the Sahara-Nile complex, people domesticated many animals including the pack ass, and a small screw horned goat which was common from Algeria to Nubia.

Agriculturally, the first cases of domestication of plants for agricultural purposes occurred in the Sahel region circa 5000 BC, when sorghum and African rice began to be cultivated. Around this time, and in the same region, the small guinea fowl became domesticated.

According to the Oxford Atlas of World History, in the year 4000 BC the climate of the Sahara started to become drier at an exceedingly fast pace.[14] This climate change caused lakes and rivers to shrink rather significantly and caused increasing desertification. This, in turn, decreased the amount of land conducive to settlements and helped to cause migrations of farming communities to the more tropical climate of West Africa.[14]

By 3000 BC agriculture arose independently in both the tropical portions of West Africa, where African yams and oil palms were domesticated, and in Ethiopia, where coffee and teff became domesticated. No animals were independently domesticated in these regions, although domestication did spread there from the Sahel and Nile regions.[15] Agricultural crops were also adopted from other regions around this time as pearl millet, cowpea, groundnut, cotton, watermelon and bottle gourds began to be grown agriculturally in both West Africa and the Sahel Region while finger millet, peas, lentil and flax took hold in Ethiopia.[16]

The international phenomenon known as the Beaker culture began to affect western North Africa. Named for the distinctively shaped ceramics found in graves, the Beaker culture is associated with the emergence of a warrior mentality. North African rock art of this period depicts animals but also places a new emphasis on the human figure, equipped with weapons and adornments. People from the Great Lakes Region of Africa settled along the eastern shore of the Mediterranean Sea to become the proto-Canaanites who dominated the lowlands between the Jordan River, the Mediterranean and the Sinai Desert.

By the 1st millennium BC ironworking had been introduced in Northern Africa and quickly began spreading across the Sahara into the northern parts of sub-saharan Africa[17] and by 500 BC metalworking began to become commonplace in West Africa, possibly after being introduced by the Carthaginians. Ironworking was fully established by roughly 500 BC in areas of East and West Africa, though other regions didn't begin ironworking until the early centuries AD. Some copper objects from Egypt, North Africa, Nubia and Ethiopia have been excavated in West Africa dating from around 500 BC, suggesting that trade networks had been established by this time.
 
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