I think the burden is on the person saying, "To mars, very soon!" to explain what they feel has changed, or changing, to allow that to be something other than a

I think the burden is on the person saying, "To mars, very soon!" to explain what they feel has changed, or changing, to allow that to be something other than a one-way, dead-end mission. If you want optimism for the sake of optimism, Facebook has some lovely mother's groups.