As the world is being over populated and running out of food resources, By early 2030s, experts predict nanorobots will be developed to improve the human digestive system, and by 2040, as radical as this sounds, we could eliminate our need for food and eating. To implement this futuristic technology, we would wear a special “nutrient belt” loaded with billions of nutrient-bearing nanorobots, which would enter and leave the body through our skin.