Grains and legumes have been staple foods for thousands of years, sustaining human life in temperate, arctic and tropical conditions. Wheat, corn and rice are among the world's most important cereal crops, offering an alternative to animal protein for those with limited access to meat. Legumes—essentially dried peas and beans—offer similar nutritional benefits. Grains and legumes are also vital because, when fully ripe and dried, they can be stored for months without spoiling, providing reliable winter food.