“Men Wanted: for Hazardous Journey. Small wages, bitter cold, long months of complete darkness, constant danger, safe return doubtful. Honour and recognition in case of success.”
That's great, but volunteering for adventure etc. should best be left to private enterprises. When NASA is funded by taxpayer money, the goal should be science and not adventure.
I'd volunteer, even if it was a one-way mission with a 10% chance of success.