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I found this image particularly fascinating. I'm not an archaeologist, however its clear the image shows previous field boundaries and or watercourses. To me it looks like the outlines of Bronze age fields showing like a ghost from 5000 years ago. They could also be watercourses in marshy land but whether fields or marshland the hut circles clearly show this was the land occupied by our ancestors. If any archeologists have more info on these marking please email and I will add it to the description.