The Creation of Moving Rocks
In the Death Valley desert in Eastern California, there are rocks that have been known to move when no one is looking. The reason they move isn't because of wind or ice, but because underneath the rocks are little fleshy creatures! These creatures have skin that is too sensitive to be exposed to the sun, so in order for them to exist in the desert they tie rocks to their backs and bury themselves underground.
During the day, the rocks absorb heat from the sun and the creatures convert this stored heat into usable energy. When the sun goes down, they travel the desert with the energy supplied by their rock-backs.