Grains have been a staple in the human diet since prehistoric times, making baking nearly as old as humanity. Early humans gathered and toasted wild grains before grinding them into paste for consumption. Later, flatbreads were created by laying grain paste on hot stones near a fire. Advanced ovens developed around 500 BC allowed the Greeks to become expert bakers. Baking became an important industry in the later Roman Empire after skilled bakers arrived from Greece. Today, opportunities exist for bakers in restaurants, hotels, and wholesale bakeries due to increasing demand for breads and pastries.