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Scientists have a new risk to space travel. They have that our DNA can change when into space. DNA mutations could the risk of space travellers getting cancer. The scientists research on 14 NASA astronauts who part in the Space Shuttle programme between 1998 and 2001. The astronauts blood samples ten days before they went into space and three days after returning to Earth. The blood has been for the past 20 years. Professor David Goukassian said: "Astronauts in an extreme environment where many factors can result in...mutations." He added: "Space radiation...means there is a risk that...mutations could ."

Professor Goukassian said his study could important for the future of space travel. In particular, several nations are on sending astronauts to Mars. Other countries are to build bases on the moon. There also a race by commercial companies to the business of space tourism. Goukassian said there were possible health risks to space travel and to exploring deep space. He said more research was to study the harmful effects of space travel on the body. This could important for NASA's Artemis project. This aims to people back to the moon for the first time in 50 years. The last time humans to the moon during the Apollo 17 mission in December 1972.