According to a statement released by the University of Cologne, a new study of grains grown by Neolithic farmers who lived in what is now Germany suggests that they diversified their crops more quickly than previously thought. Between 5400 and 4900 B.C., central Europe's first farmers grew emmer and einkorn. The outer husks of these grains must be removed before the grain can be processed. "Naked" grains, which do not have an outer hull, were introduced between about 4900 and 4500 B.C. Analysis of charred grains from 72 sites in Germany, dated to between the late sixth and early fourth...