oday, 83 Amazonian species are known to have been domesticated to some extent. They include sweet potato, tobacco, pineapple, hot peppers and even a palm tree: the peach palm. Fish were also a major source of food. Archaeological investigations at a site called Hatahara, where the Amazon and Negro rivers meet, found that fish were the main animals eaten by people living there between about 750 and 1230 AD. A staggering 37 species were on the menu, as well as freshwater turtles. A vast fish farm, complete with zigzag-shaped weirs to trap fish, has been discovered in Llanos de Moxos in northern Bolivia, at the south-west corner of the Amazon basin.