A 2023 astronaut photo shows three dark hills, or mesas, towering above part of the Sahara desert in southern Mauritania. The ...

Located approximately 8 miles northwest of Guérou in southern Mauritania, these black mesas rise steeply from the surrounding plains, reaching heights of 1,000 to 1,300 feet. Composed of sandstone, ...

Journal of Applied Meteorology (1962-1982), Vol. 8, No. 6 (December 1969), pp. 874-883 (10 pages) It is suggested that helical roll vortices in the atmosphere are responsible for the formation of the ...

After noticing how the construction of dams significantly alter the hydrodynamics of natural rivers and the resulting downstream riverbed evolution, researchers decided to apply numerical simulations ...

image: Studies of crescent-shaped dunes by Brazilian researchers could have applications in crude oil pumping and missions to Mars, among others. New findings have been published in Physical Review ...

On a cold winter day in December 2007, a bulldozer flattened nearly 40 acres (16 hectares) of Inner Mongolia's Tengger Desert. It was the start of a unique experiment: For the first time, scientists ...

Sand dunes migrate across landscapes by interacting with and repelling one another in what scientists have called "interesting and beautiful physics." These natural formations, which often cover ...

Maui’s Environmental Court recently reaffirmed its order stopping all sand mining and other activities that disturb the natural dune systems in a section of the Maui Lani Project District. Sierra Club ...

Dune formation across the solar system is influenced by varying atmospheric conditions, gravity, and surface composition, resulting in diverse dune morphologies and sizes. This variation allows for ...

South Africa is well known for its fossil heritage, a record of plants and animals that tells us what the world was like long ...

WASHINGTON, D.C., September 10, 2019 -- If you've ever looked closely at a 3D sand or sediment dune within a river or coastal area, did you wonder how it formed? After noticing how the construction of ...