<p>Hard Knocks in Tyrrhena Terra – This is largely ancient hard bedrock that has been cratered by numerous impacts over the eons.
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NASA/JPL/University of Arizona (<a rel="nofollow" class="external text" href="http://www.uahirise.org/ESP_021716_1685">www.uahirise.org/ESP_021716_1685</a>)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
2017-02-02 11:05
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