![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2011/11/100516_nobel_molecular-car.jpg?fit=860%2C460&ssl=1)
ON A ROLL A mini four-wheeled vehicle rolls across a surface when zapped with electricity that contorts the wheels’ axle.
Randy Wind/Martin Roelfs; Nature
ON A ROLL A mini four-wheeled vehicle rolls across a surface when zapped with electricity that contorts the wheels’ axle.
Randy Wind/Martin Roelfs; Nature