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Grant is a rover/ robot that collects water. In the front of Grant, there is an electric shovel that picks up dirt, flips backwards, and dumps it into funnel like structure that distributes the dirt out of the root through a hole at the bottom. He also has a camera that is connected to a computer at mission control so they can veiw what Grant is seeing. Grant has a vaccum tube on the front as well so when he finds water, he can suck it up and hold in the water holder located inside the rover. As for the wheels, they have rubber spaces on them to help with traction. The engine is located in the back of the rover.