Astronauts may need medical evacuation from one-third of moon missions

One in three missions to the moon is at risk of requiring an astronaut to be medically evacuated back to Earth. This process would be difficult and costly – a medical emergency in space is an altogether tougher situation than one on Earth – but a new tool to calculate the probability of such crises could help us prevent them.

Generally, major space agencies like NASA reduce the risk of medical…