Wednesday, 20 June 2018

Once in a Blue Dune


Sand dunes often accumulate in the floors of craters. In this region of Lyot Crater, NASA's Mars Reconnaissance Orbiter (MRO) shows a field of classic barchan dunes on Jan. 24, 2018. via NASA https://ift.tt/2M9bzkO

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NASA Astronaut Reid Wiseman Attends Ravens vs. Saints Game

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