In space for prolonged period’s contingency plans for everything, including any medical emergencies that might crop up is required.To heal injured astronautsexperts are contemplating using 3D printed biomass.Experts in the field of regenerative medicine and 3D printing biomass last month gathered together at a workshop at the European Space Research and Technology Centre to discuss how 3D printing solutions could be used to treat injured astronauts during long-drawn space missions.It might sound different, but scientists have already made some headway to make such treatments a reality.3D printing has already made a discernible mark in the field of medicine, and already, the technology has been used to bioprint ligaments and tendons from stem cells.3D printing biomass works in the exact same way as normal 3D printing does, but instead of using plastics or metal to print, 'bio-ink' consisting of human cells, nutrients etc. is used to print tissues, cartilages, etc.Given such advancements, the European Space Agency (ESA) already has projects underway to make this technology usable in long-drawn extraterrestrial missions.The agency is already undertaking research to develop technology that would enable it to bioprint "skin, bones, and body mass" in outer space. Astronauts who spend months in the zero gravity environments of the International Space Station (ISS) have to face issues like weakened bones and muscles.These medical issues might become more complicated as durations of space missions increase.With lunar missions and Mars missions planned for the 2020s, astronauts have to spend considerable amounts of time aboard spacecraft, as well as on alien cosmic bodies. In case of medical emergencies, returning to Earth would not be a feasible scenario. They feel this 3D printing would prove to be the enabler for manned extraterrestrial exploration.