Origami robot that can unfold in your gut to remove swallowed foreign objects

From Lego bricks to batteries, young children, and even the occasional adult, can swallow a bizarre array of objects. But a new foldable robot could now help doctors remove these without the need for surgery. The origami robot can be swallowed, steered through the stomach using a magnetic field and then attach itself to the foreign objects to help them pass through the digestion system. Engineers have created a foldable robot (pictured) out of dried pig intestine and a material that shrinks when heated. When folded it can be encased in a capsule of ice so it can be swallowed.