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.
Stockbyte/Stockbyte/Getty Images. Proteins. Protein is the third primary source of energy that our bodies need. Protein is extremely important to the growth of our cells and all of the metabolic and biological processes that go on inside our bodies.ave. Our bodies are finely tuned machines and like most machines our bodies need fuel. All the energy that our bodies need comes from the foods that we eat. So, if you deprive your body of any of the three sources of energy (proteins, fats and carbohydrates), it won't run efficiently.