I WONDER - What Are Sand Dunes?

The video explains sand dunes, describing them as tall sand formations created by desert winds. It details how dunes form, grow, and resemble waves. The video highlights the massive size of some dunes, such as those in the Issaouane Erg sand sea, which can reach 450 meters, nearly five times the height of the Statue of Liberty.

What new insight or understanding did you gain from this video?