The results of the analyses were recently published (online) in the journal PLoS ONE.
Dr. Welmoed Out from the University of Kiel was involved in the investigation. “With our results we can verify that people along the Nile did not only exploit gathered wild plants and animals but even crops of barley and wheat.”
These were first cultivated in the Middle East about 10,500 years ago and spread out from there to Central and South Asia as well as to Europe and North Africa – the latter faster than expected. “The diversity of the diet was much greater than previously assumed,” states Out and adds: “Moreover, the fact that grains were placed in the graves of the deceased implies that they had a special, symbolic meaning.”
The research team, coordinated by Welmoed Out and the environmental archaeologist Marco Madella from Barcelona, used a special high-quality light microscope as well as radiocarbon analyses for age determination. Mineral plant particles, so-called phytoliths, survive for a very long time, even when other plant remains are no longer discernible. In addition, calculus on the teeth provide evidence about the diet of these prehistoric humans due to the starch granules and phytoliths.
Source: Past Horizons: http://www.pasthorizonspr.com/index.php/archives/11/2014/domestic-cereals-in-evidence-7000-years-ago-in-sudan