Comment by bananzamba

"Also, we’ve learned more about the bad effects of lighter-than-Earthly gravity on human bodies,"

How can he confidently use that argument when we don't have any data between 0g and 1g, other than 12 Apollo astronauts, that spend less than 3 days on the moon?

It might very well be that the 0.38g on Mars are sufficient to make many problems go away. The two simple facts of your blood being pulled downward and moving your body around taking effort could already fix a lot of the medical issues astronauts face in 0g.