Ingestible Medical Robot

gurps_npc writes: MIT has developed a small ingestible robot to remove watch batteries that kids swallow. It starts out folded up tight and surrounded by an ice sheath. You swallow it, the ice melts, and it unfolds. Then a doctor uses magnets to direct it to the battery, it wraps itself around the battery, preventing it from leaking acid until you pass it — perhaps a bit faster with the doctor using the magnets to guide it down through your system.