UAE astronaut Sultan Al Neyadi has been testing technology in space that 3D-prints knee cartilage tissue.
Called the BioFabrication Facility, the portable equipment could one day allow doctors to treat injuries in space and remote locations on Earth.
Dr Al Neyadi arrived on the International Space Station on March 3 and Sultan188 has since been doing scientific work that ranges from studying human heart tissue, FDA-approved heart medication and acting as a test subject for a sleep research project.
"Science and health checks filled the day for the astronauts belonging to the Expedition 69 crew," Nasa said on Wednesday.
"Flight engineers Frank Rubio of Nasa and Sultan Al Neyadi of the UAE worked on the BioFabrication Facility testing its ability to print knee cartilage tissue for treating injuries in space and remote environments on Earth."