Dramatic revelation about recently discovered Scottish stone circle!

Two weeks ago LiveScience reported the exciting discovery of a previously unknown and almost complete stone circle near Aberdeen:
https://www.livescience.com/64449-ancien...tland.html

"It really doesn't get much better than this," Ackerman said. "A lot of the recumbent stone circles that people have known about for a very long time only have two or three stones left — so to have one that is complete is quite unusual."

Several local people were familiar with the stone circle near Alford, in part, because they walked their dogs at a nearby track.

One member of a local farming family, now in her 80s, remembered seeing the stone circle at some time in the 1930s, Ackerman said. But the circle was in farmland, far from the main roads in the area, and had remained unknown to archaeologists until now, he said.

Two days ago, LiveScience reported that the former owner of the land had contacted the archaeologists to tell them he had made the circle as a hobby in the 1990s:
https://www.livescience.com/64555-ancien...plica.html

"If you are having an awkward day at work, at least you're not that guy who identified a new prehistoric stone circle to the press that now turns out to be about 20 years old," Ackerman tweeted.

I must admit it seemed a little strange. At least around the UK these things are well-documented, there are books listing even the most minor of such antiquities. If a new, previously unknown one turns up, it would inevitably be a result of either excavations or some other mechanism, whether human or natural (such as tidal erosion). It wouldn't just be sitting there in plain sight where people walk their dogs.

I must admit it seemed a little strange. At least around the UK these things are well-documented, there are books listing even the most minor of such antiquities. If a new, previously unknown one turns up, it would inevitably be a result of either excavations or some other mechanism, whether human or natural (such as tidal erosion). It wouldn't just be sitting there in plain sight where people walk their dogs.

Quite.

It also makes you wonder whether there could be older "fake" stone circles that have been similarly misidentified as prehistoric. If a 20th-century farmer could amuse himself building a stone circle, why not a 17th- or 18-th century farmer? After all, such things are only rarely mentioned in medieval records. Wikipedia says about the Cerne Abbas Giant:
"Like several other chalk figures carved into the English countryside, the Cerne Abbas Giant is often thought of as an ancient creation. However, as with many of the other figures, its history cannot be traced back further than the late 17th century ..."

I must admit I also have my doubts about this prehistoric stone circle in East London: