These shapes certainly look familiar to Star Trek...  ...rek fans, and even the Shat. This is a picture of sand dunes on the surface of Mars, in an image taken by the...  ...Orbiter.Technically, they’re called barchan dunes . They can form when the wind blows predominantly...  ...obstacle, the same way wat...

Maybe the linked post should be titled "The mo...  ...should be titled "The most Beautiful Pictures of Sand Dunes ," since their beauty is well-captured by a variet...