In the final part of the Stone Age, farming is adopted around the world. Pigs, goats and sheep are domesticated around 11 000 BC, and founder crops (emmer and einkorn wheat) appear around 9500 BC. Between 8500 and 5000 BC, agricultural societies form around the great rivers in the Middle East (Tiger, Euphrates), China (Yangtze, Yellow river) and India (Indus).