Mars mission couple have to coat spacecraft walls with their own POO to protect from cosmic rays

Mars mission couple have to coat spacecraft walls with their own POO to protect from cosmic rays | Mail Online: "Not only will they have to spend 501 days together in cramped conditions, the man and woman selected for multimillionaire space tourist Dennis Tito's $1 mission to Mars will have to coat the walls of their spacecraft with their own faeces to block space radiation, it has been revealed."