A sea of dark dunes, sculpted by the wind into long lines, surrounds Mars’ northern polar cap and covers an area 19 miles (30 kilometers) wide. Credit: NASA/JPL-Caltech/ASU. |
A sea of dark dunes, sculpted by the wind into long lines, surrounds Mars’ northern polar cap and covers an area 19 miles (30 kilometers) wide. Credit: NASA/JPL-Caltech/ASU. |
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