blunt-science:Described as “The delicate fingerprints of water imprinted on the sand” by the photo
blunt-science: Described as “The delicate fingerprints of water imprinted on the sand” by the photographer; ISS Astronaut Kjell Lindgren, these tracks have been etched out by the passage of water across the desert near Hamra Al Drooa, Oman. Via NASA and Kjell Lindgren -- source link
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