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"Time and Space … It is not nature which imposes them upon us, it is we who impose them upon nature because we find them convenient."
Henri Poincaré

This image combines several layers of images shot above Tassili n'Ajjer in Algeria by the Landsat satellite (using infrared, near-infrared, and visible light) in the year 2000. The first shows the original image, the two following I cut out in original resolution.

201214   |   photo geography earth mountain rock sand river rainbow