Georgia Tech researchers wanted to understand precisely how blackworms execute tangling and ultrafast untangling movements for a myriad of biological functions. To investigate, they linked up with mathematicians at MIT to understand the topology of the tangles. Their research could inform the design of fiber-like, shapeshifting robotics that self-assemble and move in ways that are fast and reversible. The study also highlights how cross-disciplinary collaboration can answer some of the most perplexing questions in disparate fields.