Sure, pills that survey the wild and nauseating gastric landscape have been done before -- but how about one that can "swim" to input from a doctor-controlled joystick? A team of Japanese researchers have successfully achieved just that, with a newer, smaller, creepier version of a device they call "Mermaid." Ariel jokes aside, the tadpole-shaped accessory has successfully self-propelled itself around different parts of its host's digestive tract, all while dutifully phoning home with what we presume are pictures only a licensed physician could stomach. Whether or not the entire shindig was in high definition wasn't specified, but let's pretend your brain didn't just wonder precisely that.