The system is on wheels and can go anywhere in the operating room.

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Without a go-to scorer on the floor, the wheels came off for the Knicks during the third quarter, when they turned the ball over five times (they'd finish with an uncharacteristic 17 miscues for the game).

WSJ: Lin Helps Rockets Knock Off Knicks

Trains move on wheels with tires, making them go smoother and quieter.

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Operators can go anywhere on the Cartesian plane (x, y and z axes) because the wheels can spin at different speeds.

FORBES: Airtrax topples the tyranny of steering.

Operators can go anywhere on the Cartesian plane (x, y and z axes) because the wheels can spin at different speeds (see graphic).

FORBES: Airtrax topples the tyranny of steering.

The highly contagious virus can be carried by the wind, on the soles of shoes or on the wheels of cars, and the British countryside has become a virtual no-go area.

CNN: Outbreak sparks UK meat shortage fears