[Rockhounds] Who made these circles in the Sahara?

[linda at middleearthminerals.com]

That is an absolutely astounding 27-minute video which combines history,
geography, geology, culture and technology to answer an intriguing puzzle.  
I particularly love the clips with the dozens of people who shed light, or
sometimes cast misdirection, on the goal of the research.  Ç'est
fantastique!
Thank you very much, Paul!
Linda

-----Original Message-----
From: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> On Behalf Of
Paul
Sent: Sunday, February 19, 2023 9:54 AM
To: Rockhound List <rockhounds at rockhounds.drizzle.com>
Subject: [Rockhounds] Who made these circles in the Sahara?

This is a wonderful documentary. It shows how much effort can be needed to
ground truth aerial imagery and critically evaluate various hypotheses about
the origin of features seen aerial imagery of any type.

Who made these circles in the Sahara? Vox
https://www.youtube.com/watch?v=twAP3buj9Og

Yours,

Paul H.


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