Humankind would probably not exist were it not for cultivated grasses, whose edible seeds are known as grains or cereals. Wheat, maize, rice, and other cereals are the basis for civilization, and rice is the most popular grain in the world: It is cultivated in 113 countries, and a primary food source for more than half of the world’s population. In addition, it is the only major crop grown exclusively for human consumption and feeds more people around the world than any other crop. For these rea…