面包从史前到现代的进化史 The History of Bread From Pre-historic to Modern Times

Man, as is evidenced by his teeth, was created graminivorous, as well as carnivorous, and the earliest skull yet found possesses teeth exactly the same as modern man, the carnivorous teeth not being bigger, whilst in many cases the whole of the teeth have been worn down, as if by masticating hard substances, such as parched grain.