Starch residues on stone tools suggest early humans ate a balanced diet.
Once thought of as near total carnivores, early humans ate ground flour 20,000 years before the dawn of agriculture. Flour residues recovered from 30,000-year-old grinding stones found in Italy, Russia and the Czech Republic point to widespread processing and consumption of plant grain, according to a paper published online this week in Proceedings of the National Academy of Sciences1
Fuente: Nature magazine. http://www.nature.com/news/2010/101018/full/news.2010.549.html