Asteroids range in size from Ceres-the largest at about 950 kilometers (590 miles) in diameter and also identified as a dwarf planet-to bodies that are less than 1 kilometer (0.6 mile) across. The total mass of all the asteroids combined is less than that of Earth's Moon.
Only about one-third of the protein eaten around the world comes from animals raised for food. Much of the protein consumed around the world comes from vegetarian sources, including grains, legumes, nuts and seeds. Three grains -- wheat, maize and rice -- provide 60 percent of the world's energy, as well as a good percentage of the protein consumed.
Good protein sources. Fish and seafood. Seafood is one of the best sources of protein because it is usually low in fat. Certain fish, such as salmon, are a little higher in fat but it is the heart-healthy kind: Omega-3 fatty acids. White-meat poultry. Stick to the white meat of poultry for excellent, lean protein. Dark meat is higher in fat.