A soft robot smaller than postage stamp made of rubber and controlled by electromagnetic forces can swim, jump and rotate and it could outrun a cheetah if one was shrunk to its size.Guoyong Mao at Johannes Kepler University in Austria and his colleagues made the ultrafast soft robot out of a rubbery material and controlled it with electric currents and a magnetic field. They hope it will eventually be used in medicine, for delivering pharmaceuticals or performing procedures inside the human body.
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