In looking for other Google articles, I found this comment I had left at a Quora site. I still agree with myself almost a year later.
Mar 24, 2019
The photos shown above may be old dunes with vegetation since grown. However, I spent many hours looking at Google Earth and the area indicated as possible ancient irrigation is at least 300 x 300 miles. Also the patterns are much more regular than the “dunes” shown above (at the Quora site). The “canals” are roughly 1 mile apart, the land between them is basically flat, NOT mounded like a dune. There are areas that appear more eroded (more ancient?) than others.
My question is why has not more study been done on this very large area question? Was it a precursor to Great Zimbabwe? Is the “white” world unwilling to imagine that black Africans might have had a major complex civilization many millenia ago? National Geographic, where are you???
Don’t take my word for it. Spend a few hours on Google Earth. Look from high up and search how extensive this area is. Then go to close up and travel across the land from ditch to ditch. Then travel up some of the ditches and see the small huts or communities that occur occasionally along them. Then try to tell yourself these are dunes.
Look for a contour map of the areas in question...................
I don't respond to race card BS; and the fact remains, these are natural formations, and there isn't any credible question about it.