NASA's Landsat 8 satellite, in this natural color image of the Tanzerouft Basin in Algeria, shows concentric rings of exposed sandstone strata that create stunning patterns.

The Tanezrouft Basin's colloquial name is the Land of Terror because, for many, to traverse this land is to stare death in the face. Annual rainful is measured at less than 5 mm (0.2 inches). It's a place of very high temperatures and scarce water and vegetation. There aren't even any permanent residents there, only occasional Tuareg nomads.

Mona Evans
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