With obesity and diet-related diseases on the rise, and hunger and malnutrition affecting more people than ever before, scientists are focusing not only on how to feed the planet, but on what to feed it. Today, bad diets seem to have more staying power. Natural and raw foods are being replaced by ready-to-eat meals and processed foods. This trend has created an unhealthy globalized menu, one associated with obesity, diabetes, hypertension, and shortened lives. By Eduardo Nilson.