Explaining The Universe on Instagram: "NASA’s space “claw hand” is a specialized robotic gripper designed to collect rocks and soil in environments with little to no gravity. It uses motorized joints and reinforced metal fingers or scoops that can close tightly around a sample without relying on weight to keep it in place. Cameras and sensors guide the arm so it can approach a rock accurately, then the claw secures it using precise, controlled pressure. Many versions also include drills or seale