> Also, I don't think "always be the case" is a foregone conclusion. Mars' current evolutionary tree isn't looking very good. I think they mean the opposite of

> Also, I don't think "always be the case" is a foregone conclusion. Mars' current evolutionary tree isn't looking very good. I think they mean the opposite of what you inferred; they're saying we'll always need to be lucky to keep surviving, not that we won't need to be lucky to keep surviving after a certain point