Bok
05-18-2016, 09:47 PM
Expedition 47 Flight Engineer Tim Kopra of NASA posted this May 15, 2016 photograph to social media, writing, "Water etchings in western @Mexico sands. @Space_Station #Explore"
More... (http://www.nasa.gov/image-feature/water-etchings-in-western-mexico-sands)
More... (http://www.nasa.gov/image-feature/water-etchings-in-western-mexico-sands)