Enormous polygon patterns in rock lie dozens of meters below Mars’ surface, ground-penetrating radar data suggest. Similar patterns develop on the surface in Earth’s polar regions when icy sediments ...

NASA's Curiosity rover snapped this view of polygon-patterned bedrock on May 4. Mars is home to a lot of odd-shaped rocks that can look pretty random. Patterns, however, can catch scientists’ eyes.

Question: How important is the effect of micro-relief and vegetation type on the characteristics of vascular plants and bryophytes in low-centred polygons? Location: Siberian Arctic, Russia. Methods: ...