The wind can blow dirt in your eyes, piling up leaves in your garden and throwing raindrops and snow against your window.
But, Did you know that the wind can move a hill and make it disappear??
When the wind blows in the deserts, piles up the sand forming little mountains called dunes.
But the wind doesn't always blow in the same direction.
For this, dunes move from one place to another when the wind direction changes.
The wind carries the grains of sand from the top of the dune and deposits them on the side.
Little by little they are being covered by the rest of the sand of the first dune.
While the wind blows the dunes are made and unmade, moving a little further.
Observing a dune you can know in which direction the wind blows.
The round part of the dune faces the wind. The steepest and steepest part, back to the wind.
