The peanut (Arachis Hypogaea) is a legume that grows on tropical and sub-tropical plains. It is thought that the plant originated between Brazil and Peru in South America before it was spread by European explorers to North America, Asia, and Africa.
Today over 29 million metric tons of peanuts are produced every year by farmers the world over. The five largest peanut-producing countries in the world are China, India, the United States, Nigeria, and Indonesia.
Remarkably, peanuts are not only good to eat. Every part of this plant has an economic value. The shells can be used to feed livestock, burned for fuel, or made into particle board, among other uses, and peanut vines and leaves make excellent high-protein hay for horses and other livestock.