Engineers at Cornell University have developed the Cross-Link Collective, a unique robotic system that operates more like a flowing material than traditional machines. This system consists of multiple narrow robotic modules that connect via weak Velcro patches, allowing them to move and adapt collectively without centralized control. Each module measures about 200 millimeters long and 20 millimeters wide, powered by small internal motors that enable them to switch between an 'I' shape and a 'U' shape, facilitating movement across various surfaces. When linked, the robots can navigate obstacles more effectively than when operating individually, resembling the behavior of fluids in dynamic environments. The system is designed to be resilient, maintaining functionality even if some robots fail, thanks to its lack of a central controller. Researchers found that incorporating a small amount of sensing capability improved coordination, allowing robots to emit buzzing signals to help rejoin the group. This innovative approach is inspired by active gels and aims to advance soft robotics for unpredictable real-world applications, as noted by Kirstin Petersen, a professor at Cornell.