The bright white sand dunes are always changing,always moving, like waves on the ocean.
VOA: special.2010.01.04
Some of the dunes are small and fast-moving.
VOA: special.2010.01.04
"Now with the new images, we're able to watch when the frost comes and goes and we can see that dunes are moving today and aren't just relics from times past, " Zurek said.