In the Andes region of South America, with civilizations including the Inca, the major crop was the potato, domesticated approximately 7,000-10,000 years ago. Coca, still a major crop to this day, was domesticated in the Andes, as were the peanut, tomato, tobacco, and pineapple. Cotton was domesticated in Peru by 3600 BC. Animals were also domesticated, including llamas, alpacas, and guinea pigs.