Two sizes of ripples can be seen in this view of a Martian sand dune. The larger ripples are roughly 10 feet apart, and unlike any type seen in earthly sand fields. The smaller ripples ...

Ripples imaged on the surface of sand dunes on Mars are unlike any seen on any land form of Earth. Researchers believe investigation of these ripples may provide astronomers with a look into the ...

On Earth they tend to form in long parallel lines from sand grains being pushed by water or air at right angles to the ripple lines. Dunes, on the other hand, are formed when grains of sand ...

(via It's Okay to Be Smart) How can sand, blown by the wind, form such intricate and beautiful patterns as ripples and dunes? The answer is a surprising secret of self-organization. In this video, we ...

However, sand on Mars comes in different hues, much like on Earth, and it also forms structures that cover large areas — either as dunes or ripples. An image released by NASA on Tuesday shows ...

“Earth and Mars both have big sand dunes and small sand ripples, but on Mars, there’s something in between that we don’t have on Earth,” said Mathieu Lapotre, a graduate student at Caltech ...

We created the first scaling laws for snow dune and ripple growth and movement. We compared them to the scaling laws for sand dunes and ripples. The end goal is to create a dynamic model for snow ...

Larger sand dunes form sinuous crests and individual domes. There are tiny ripples on the tops of the dunes, only several feet from crest-to-crest. These merge into larger mega-ripples about 30 ...