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
[www.youtube.com]

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)



Edited 1 time(s). Last edit at 02/19/2023 01:04PM by Hermione.