How are sand dunes formed and why do they even exist?

The strange, beautiful shapes that sand dunes form are a mystery. Now researchers are conducting huge desert experiments and using dune racetracks to figure it out

The Great Sand Dunes, Official Visitor Guide

Solar system news, articles and features, Page 6

Features – latest in science and technology, Page 47

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How are sand dunes formed and why do they even exist?

How Singing Sand Dunes Produce Desert Music

Dune - Wikipedia

Shifting sands

Art Photography Wild Sand Dunes End Of The Day, 53% OFF