Among the various types of dunes, a barchan is known to form when the ... "The grain rises about a meter and describes a parabolic curve. The direction of flight is the main direction of the ...

Next, they used their model to predict the transition from barren, arc-shaped barchan dunes to parabolic dunes covered in vegetation. This occurs when the transport of sand drops below a certain ...

Barchan dunes are crescent-shaped features that occur ... witnessing five human spaceflight launches on two continents, flying parabolic, working inside a spacesuit, and participating in a ...

The smooth curve with long trailing points is characteristic shape of a barchan dune, commonly created by a limited sand supply exposed to steady winds. Dunes are an aeolian feature, created by ...

No sand dune is an island. Interactions between crescent-shaped, or barchan, dunes stabilize the mounds and explain how vast swarms of them can persist over time, two new studies find. But the ...

Barchan dunes are arc-shaped horns that face downwind. As well as on Earth, they have also been observed on Mars, where the thin atmosphere produces winds strong enough to move sand and dust.

Some types of sand dunes can do this in the real world. According to a report published today in the journal Nature, so-called barchan sand dunes, which are crescent-shaped and highly mobile ...

Mars, along with parts of Earth, is covered in what are called barchan dunes—features shaped into crescents by wind activity and their positions in a valley or a crater. Next, why don’t we ...

According to Johns Hopkins scientist Ralph Lorenz, who co-authored the Geomorphology paper, Dunes on Planet Tatooine: Observation of Barchan Migration at the Star Wars Film Set in Tunisia ...

On the west (left) side of this image from NASA’s Mars Reconnaissance Orbiter, fairly textbook-looking barchan sand dunes sit atop the bedrock. Barchan dunes pointing in the opposite direction ...