An exoskeleton is a rigid external covering that provides support and protection for an organism, commonly found in arthropods like insects and crustaceans. It serves as a structural framework, allowing these creatures to maintain their shape and protect against predators and environmental hazards. Exoskeletons are made of materials such as chitin, and they must be molted periodically to accommodate growth. In recent years, the concept has also been applied to robotics and wearable technology, where mechanical exoskeletons assist humans in lifting heavy objects or enhancing mobility.