Barchan Dunes: Crescent-shaped sand dunes formed by wind in arid environments, characterized by their distinct shape and movement patterns. Fluid Dynamics: The study of the behavior of fluids ...

Related: See all the best images of Earth from space A group of five barchan, or "horned," sand dunes can be seen in a zoomed-in version of the 2013 photo (see below). Over time, these arrowhead ...

The word means “crescent-shaped dune” in the Turkic languages of eastern ... of the broad stony basin until we found a 50-foot-tall barchan to give us some shelter for the night.