Photograph by George Steinmetz @geosteinmetz Women work a mosaic of salt ponds on the edge of the #Sahara in #Niger. Briny water is taken from nearby wells and mixed with salty soil to produce slurries of different colors, and the evaporation leaves a skin of #salt on the surface. To see the whole story of these hard-working ladies, go to @geosteinmetz and swipe right. A post shared by National Geographic (@natgeo) on Feb 14, 2018 at 10:38am PST