In the article says the engineers said its a matter of adding too much complexity. Also consider that its a few months trip (Scott Kelly did over a year) and t

In the article says the engineers said its a matter of adding too much complexity. Also consider that its a few months trip (Scott Kelly did over a year) and the real problem is when they live there. Mars gravity is only 38% of earths. So the problem while slower, still will be an issue.