Grass lands cover vast plains, such as savanna, prairies and pampas. The many, almost indestructible grass species, for various types of soil and other conditions, feed huge herds, whose migrations are followed by many predators and (semi-)nomadic peoples, such as the Mongol master horsemen. Some still practice hunting-gathering, such as the Khoisan, or traditional 'natural' herd breeding, others as in Australia use technology to gain maximal control. Domesticating cereals and edible grazers was crucial in human history, leading to vast food surpluses and sedentary civilization.
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