Between 50 and 60 percent of all the plants people eat worldwide today can be traced back to the region in which the Incans lived. The two most common and important were corn, or maize, and potatoes. Today, people still eat corn on the cob, creamed, popped, and as hominy grits or corn bread. Quinoa and amaranth are popular grains available at health food stores in bread, crackers, breakfast cereal, and flour. Amaranth has been added to the diet of NASA astronauts because of its important nutritional value.