Archaeological excavations have finally answered the question regarding the age and development of the mysterious prehistoric fields enclosed by earthen ridges known as ‘Celtic fields’. Using Optically Stimulated Luminescence (OSL), a technique that dates the last exposure to light or heat sources of quartz minerals, archaeologist Stijn Arnoldussen from the University of Groningen managed to determine that these banks around the later prehistoric field plots were constructed more than 3100 years ago and remained in use for hundreds of years thereafter... The Celtic field complex targeted by the Groningen Institute of Archaeology at Lunteren measured at least 210 hectares in...