SANTA CRUZ, CA--Perfect circles of stones cover the ground in parts of Alaska and the Norwegian islands of Spitsbergen. Elsewhere in the far north, stones form other striking patterns on the ground: ...

In remote regions of the Arctic, Antarctica, and the Australian outback, an explorer can trek across bleak, uninhabited landscapes only to suddenly stumble upon ground decorated with weird patterns.

Near the Markha River in Arctic Siberia, the earth ripples in ways that scientists don't fully understand. Earlier this week, NASA researchers posted a series of satellite images of the peculiar ...

Images taken by the Mars Global Surveyor, now orbiting the Red Planet, suggest that most areas with geological features known as patterned ground appear at high latitudes, the same regions where large ...

Researchers may have an explanation for the natural near-perfect circles of stones that cover the ground in parts of Alaska and the Norwegian island of Spitsbergen. One of the real mysteries to me was ...

[Above] Mars: Summertime view of polygons, highlighted by dark, windblown sand, on the floor of a crater at 71.2°S, 282.6°W. [Above] Earth: Polygonal cracking can be seen on the floor of Alatna Valley ...

Perfect circles of stones cover the ground in parts of Alaska and the Norwegian islands of Spitsbergen. Elsewhere in the far north, stones form other striking patterns on the ground: polygons, stripes ...