NASA rethinking death in mission to Mars CNN

How do you get rid of the body of a dead astronaut on a three-year mission to Mars and back?
When should the plug be pulled on a critically ill astronaut who is using up precious oxygen and endangering the rest of the crew? Should NASA employ DNA testing to weed out astronauts who might get a disease on a long flight?
With NASA planning to land on Mars 30 years from now, and with the recent discovery of the most “Earth-like” planet ever seen outside the solar system, the space agency has begun to ponder some of the thorny practical and ethical questions posed by deep space exploration.
Some of these who-gets-thrown-from-the-lifeboat questions are outlined in a NASA document on crew health obtained by The Associated Press through a Freedom of Information Act request.
NASA doctors and scientists, with help from outside bioethicists and medical experts, hope to answer many of these questions over the next several years.