Find out that the Grand Canyon, a colossal Arizona chasm carved by the Colorado River, showcases billions of years of geological history. Its vibrant, layered rocks reveal Earth's past. A UNESCO World ...

The high-resolution images, which show a variety of interesting landforms, were taken with NASA’s High Resolution Imaging Science Experiment (HiRISE) onboard the Mars Reconnaissance Orbiter (MRO).

There are several interesting landforms including: 1) an outcrop with possible layering; 2) a cluster of other outcrops of darker-toned material that might be inverted channel deposits; and 3) an ...

Linn also creates his own names for the new landforms, such as islands and inlets, that emerge in his maps. This part takes the most time, but is also the most fun, he says.