![](https://www.nasa.gov/sites/default/files/thumbnails/image/pia23952.jpg)
Exquisite layering is revealed emerging from the sand in southern Holden Crater. Sequences like these offer a window into Mars' complicated geologic history. via NASA https://ift.tt/37c8bBu
The blue tentacle-like arms containing gecko-like adhesive pads, attached to an Astrobee robotic free-flyer, reach out and grapple a "...
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