In a recent study published in Proceedings of the National Academy of Sciences (PNAS), researchers discovered that biofilms made of a specific type of bacterium, Flavobacterium johnsoniae, can form 3-D structures called Zorbs that are capable of moving. Not only do these structures move, but researcher, Shruthi Magesh, from the Wisconsin Institute for Discovery have also found that they can transport other species of bacteria by forming tri-zorbs.