A RECENT paper in Science addresses an intriguing question: Did North America have settled agriculture before the arrival of Europeans? Or were the people in North America still in the hunter-gatherer stage, unlike Mesoamericans, who had advanced civilisations, such as the Mayans, Aztecs, and the Incas? The answer is that it did have significant agriculture, which "disappeared" only after their encounters with the invading Europeans settling in their lands.