A quipu, or knot-record (also called khipu), was a method used by the Incas and other ancient Andean cultures to keep records and communicate information. In the absence of an alphabetic writing system, this simple and highly portable device achieved a surprising degree of precision and flexibility.
Islam gained momentum during the 10th century in West Africa with the start of the Almoravid dynasty movement on the Senegal River and as rulers and kings embraced Islam. Islam then spread slowly in much of the continent through trade and preaching.
Pilgrimage to Mecca. Mansa Mūsā, either the grandson or the grandnephew of Sundiata, the founder of his dynasty, came to the throne in 1307. In the 17th year of his reign (1324), he set out on his famous pilgrimage to Mecca. It was this pilgrimage that awakened the world to the stupendous wealth of Mali.
The "many islands" people are also called D. Polynesians.
Catal Huyuk is located in a relatively high fertile plateau. The plateau is surrounded by mountains on all four sides that gradually lift the terrain up and thus making the plateau have a nest-shape. This is a place that is semi arid, so the landscape has kind of steppe like appearance, with dry looking mountains around it, with the yellowish and brownish colors dominating.
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Market economies utilize private ownership as the means of production and voluntary exchanges/contracts. In a command economy, governments own the factors of production such as land, capital, and resources
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