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Paper-Thin Robot Squeezes 3mm G

South Korean researchers built a paper-thin robot that squeezes through 3mm gaps and lifts 70x (!) its weight. The flexible robotic "sheet" mimicks myosin, the protein that powers muscle contractions in your body. Inside the sheet are dozens of microscopic air chambers stacked in layers. When air flows through them in a specific sequence, tiny feet move like muscles pushing and returning. Each foot repeats a simple push-and-return motion, allowing the robot to travel long distances with small movements. In demos, it navigated through a pipe with just 3 millimeters of clearance while carrying a camera 23x heavier than itself. The team also attached it to a standard 2-finger gripper, instantly giving it the ability to rotate and reposition objects mid-air without moving the arm. One day this could be used in minimally invasive surgery, allowing robots to navigate through the body's smallest passages.