This image shows dark sand dunes and inverted craters in the Arabia Terra region of Mars. The sand is dark because it was probably derived from basalt. The 'inverted' shape is found on Mars and Earth where erosion has stripped away surrounding topographyFrom The Daily Mail:
There crystal clear views of alien rock formations are just a few of the impressive images sent back from Nasa's Mars Reconnaisance Orbiter.
Captured by the onboard HiRise camera, they show dramatic landscapes including inverted craters, deep water-forged gullies and frost covered dunes. To date, scientists have released 11,762 such images to the public.
They were sent back to Earth from the spacecraft, which is circling the Red Planet 72million miles away.
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