Structure The design of the physical structure comprising a robot’s body is key to enabling motion, balance and manipulation. Robots that can change body shape, such as ‘metamorphic’ and ‘soft body’ robots, provide unique flexibility to navigate uneven surfaces and constrained spaces, while manipulators that can change can grasp irregular objects and perform dexterous tasks. --- Why is it hard for a robot to walk? Robots need to carry a processor and power supply, as well as sensors, and these components can be heavy and awkward. Metamorphic or ‘origami’ designs allow a robot’s structure to rebalance as it moves, making walking more tractable. --- Why is it difficult for a robot to grasp? Picking up objects requires a complex combination of vision and touch. Creating robots that can grasp, hold, tilt, and push objects with just the right amount of strength brings robots closer to human-like dexterity, and greatly increases their usefulness.