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Agriculture is the science and art of cultivation on soil and the rearing of livestock. Agriculture was the key development in the rise of sedentary human
civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. The study of agriculture is known as
agricultural science. The history of agriculture dates back thousands of years; people gathered wild grains at least 105,000 years ago and began to plant
them around 11,500 years ago before they became domesticated. Pigs, sheep, and cattle were domesticated over 10,000 years ago. Crops originate from at
least 11 regions of the world. Industrial agriculture based on large-scale monoculture has in the past century come to dominate agricultural output, though
about 2 billion people worldwide still depend on subsistence agriculture.