Aerial Sheep Flow
I may never get tired of drone videos of sheep herding. They are mesmerizing to watch and full of so many characteristics of flow. Like a compressible fluid, the herd squeezes together as it passes through a gate, then spreads and decreases density as it reaches the pasture. (Video credit: L. Patel; via Colossal; submitted by Florian T. and Matevz D.)
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