In this picture, the Curiosity rover is sitting on top of six shiny wheels.  The picture was taken from the side of the rover and only four wheels are visible.  The wheels have a black coating which makes them slip resistant.  On the right of the rover is an engineer who is wearing a white 'bunny suit' to prevent him from getting any unwanted Earth microbes onto the rover.  The engineer is holding one of the lift cables used to put the rover onto the wheels.  A pink heavy-lift crane is visible over the rover.  The crane is used to lift the rover body within the room.  Behind the rover, lots of lab equipment and other parts are scattered around the cleanroom.
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Credit: NASA/JPL-Caltech