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 ...

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 ...

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 ...

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 ...

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 ...

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.

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 ...