
This isn't 3 astronauts for a few days. We'll need to be reasonably self-sufficient on Mars from day 1, because of the time it takes to get there. We need lots of people to make it work. It's not feasible to keep going back and forth; people will be staying there for many months/years at a time, even the first trip.
( , Mon 30 Jul 2018, 15:20, Reply)

Taking 100 people to Mars is simply ridiculous. Keeping them going for months or years is ridiculous2.
( , Mon 30 Jul 2018, 16:00, Reply)