NASA has released a new image of the red planet, showing a large sand dune that looks like a giant leech—but it’s the surface below that has scientists a bit more interested.
A large Martian sand dune looks like a leech.
But that's not the only important thing about the image.
The photo taken by NASA's Mars Reconnaissance Orbiter also shows heavily fractured ground beneath the sand dune and between those surrounding it.
The fractured surface could be shattered bedrock that's wind-and-erosion resistant—evidence of years and years of stress or changes in temperature.
Or it
