Worms are not the first thing that come to mind when one thinks of space travelers. However, that is exactly what the researchers from Tufts University decided to send to the International Space Station (ISS) on January 10, 2015. The group of planarian flatworms (Dugesia japonica) selected for their ability to regenerate any body part, were in varying states. Some were left whole, others had their head or tail sliced off, while a select few were shipped with neither head nor tail!