Mission to Mars: how space exploration pushes the human body to its limits
On January 14 2004, the United States announced a new "Vision for Space Exploration", promising that humans would not only visit space but live there. Two decades later, Nasa's Artemis programme is preparing to return astronauts to the Moon and, eventually, send humans to Mars. That mission will last around three years and cover hundreds of millions of kilometres. The crew will face radiat