3. That time you had an alien in your stomach

Researchers at MIT have designed an origami meat robot (their language, not ours!) to patch stomach wounds, deliver medicine, and remove dangerous foreign objects (perhaps ancient alien parasites) from patients.  Built from a type of dried pig intestine used in sausage casings, the robot is folded into an ice capsule that melts on its way into position in the patient’s stomach.  Once in position, and with the capsule fully dissolved, the robot unfolds.  A physician then guides the robot into position using a magnetic field.  The robot responds to changes in the field by rotating and pivoting on small fixed feet.  In tests within a pig’s stomach, the robot has been able to attach itself to and remove swallowed batteries.  Aliens, you are next!