Imagine this: you accidentally swallowed a battery (!), and to get it out, you need to take a pill that turns into a robot. Researchers from MIT, the University of Sheffield and the Tokyo Institute of Technology have developed a new kind of origami robot that transforms into a microsurgeon inside your stomach. They squished the accordion-like robot made of dried pig intestine inside a pill, which the stomach acid dissolves. A magnet embedded in the middle allows you or a medical practitioner to control the microsurgeon from the outside using another magnet. It also picks up the battery or other objects stuck inside your stomach.