ingestible origami
This ingestible origami 'robot' is made of meat and unfolds in your stomach
Researchers from MIT have designed a new ingestible "robot" that could one day be used to patch internal wounds, deliver medicine, or remove accidentally swallowed objects from the stomach. The design consists of a specially folded sheet of dried pig intestine (usually used in sausage casing) and a tiny magnet. Folded up, this capsule can be swallowed by a patient. It then hits the stomach and unfolds in the acidic juices, where it can be guided to complete certain tasks using external magnets. The design is very much a work-in-progress, but its creators think it offers a promising model for the future.