It was cold, spine chilling even. The sky, sand and dust were red. Cliffs and craters littered the ground. A sound comes from a distance. It steals the quite, peaceful glow of this majestic place.
From a distance, there is a small motorized machine. It has six wheels and many solar panels. In the middle left wheel there is a faint squealing sound. This is where the idea is found.
The wheel itself is strong. Someone could even say impossible to take apart. Within the tire is a rim. In the very middle of the rim is a bearing. It is filled with hundreds of little balls. The idea is found piece by piece inside these balls.
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