Next time you explore a beach or a desert, look down at the sand. You might spot patches of small ripples just a few centimeters tall. Wind can shape these miniature dunes in less than half an hour ...
Kevin Revolinski highlights the Grand Sable Dunes, the Sleeping Bar Dunes and the Indiana Dunes. If you made a list of all the different ecosystems in Wisconsin, it might take you a while to get to ...
Mars has a vast sea of sand dunes in the high latitude region encircling its north polar cap, known as the North Polar erg. These dunes are made up of basalt and gypsum sand grains. In some regions of ...