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Mission control on earth receives an urgent communication from Mars that an astronaut has fractured his shinbone. Using a handheld scanning device, the crew takes images of his damaged tibia and transmits them to earth. Orthopedic surgeons then use a 3D printer to create an exact replica of the astronaut’s leg from medical imaging files obtained before the voyage. Surgeons on earth use a robot to stabilize the bone with a metal plate on the 3D replica. The data is transmitted back to Mars, where surgical instruments, a personalized plate and screws are 3D printed. Finally, a surgical robot operates on the injured astronaut...