Origami-inspired robot can deliver drugs at the site they are needed

A wireless origami-inspired robot could travel through the digestive system, releasing accurate drug doses at the site they will be most effective. Qiji Ze at Stanford University in California and his colleagues have built a 7.8-millimetre robot from polypropylene film that is just 0.05 millimetres thick. At each end is a thin magnetic plate that enables external magnetic fields to control the robot's movement as it travels inside a body.