What happens is that the wind blows the sand up the shallow slope on the other side, and then, as each sand grain hits the top of the ridge, it cascades down on the inside of the crescent, and so the whole horn shaped dune moves.

If you want to stop a sand dune from moving, what you need to make sure to do is to stop the grains from avalanching over its crest.

Magnus Larsson Turning dunes into architecture

Mobility and translocation of sand dunes and sand encroachment.

The desert is there, sand dunes, some small field.

And when you go to the beach, what do you get? You get sand dunes.

Some of those grains may then accumulate on a massive scale, into a sand dune.

So let's make architectural sand dunes and a beach cabana.

The beautiful thing is that it moves bodily.

There's hundreds, up to a 1,000 or 1,200 miles of dunes.

We then pull the piles up through the dune and we're able to create almost any conceivable shape inside of the sand with the sand acting as a mold as we go up.

Hey, Lily. Build us a castle in the sand.

(d) Implementation of the project Sand Dune Rehabilitation, in Anguilla from June 1997 to July 1998, in collaboration with OECS. The objectives are the rehabilitation of dunes in two sites in Anguilla and the building of awareness on sand dune rehabilitation and beach erosion processes

Inside of the dunes we find shade.

It's obviously a place which is very dry, or you wouldn't get dunes.

Off here, the dunes are bathed in a rosy glow.

It adds roughness to the dune's surface, to the texture of the dune's surface, binding the grains.

Sand dunes are almost like ready made buildings in a way.

Al Nair

So they went out and they modeled a computer model of a sand dune.

It says, well, there's the sea, there are dunes, and I'm here.

The dunes here move southward at a pace of around 600 meters a year.

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Itissaid that stork brings us happiness

As I said earlier, it looked very much like Earth, so you see sand dunes.

Now, sand dunes cover only about one fifth of our deserts.

Chizuo's house is bigger.

I thin I will go to see Chizuo.

It was really quite remarkable in its way.

So, we have a way of turning sand into sandstone, and then creating these habitable spaces inside of the desert dunes.

So, we pushed the piles down through the dune, and we create an initial bacterial surface.

The stork brought us.

The crane which lives 1,000 years

In a desert plain in Tanzania, in the shadow of the volcano Ol Donyo Lengai, there's a dune made of volcanic ash.

They love Namibia for its beautiful dunes, that are even taller than the Empire State Building.

But, by now, you're probably asking, how am I planning to solidify a sand dune?

20. The Department of Fisheries and Marine Resources, in partnership with the Planning Department and the Anguilla National Trust, has launched a Sand Dune Rehabilitation Pilot Project in an effort to help rehabilitate the dunes and raise public awareness of the importance of these natural features.

It retains its crescent shape and moves in the direction of the horns.

It's what's technically known as a barchan, and the entire dune walks across the desert in a westerly direction at a speed of about 17 meters per year.

Every Japanese kid learns how to fold that crane.

But what is enveloping Machu Picchu from below?

Where were they? It got even more puzzling when we found dunes.

A young man... The smartest one of the crowd, mind you.

Eleonora Giardinelli, a white swan in a pond full of frogs.