I find it interesting that people find these equally challenging. For the record, we know way too much about Mars and too little about the machine that makes us

I find it interesting that people find these equally challenging. For the record, we know way too much about Mars and too little about the machine that makes us want to go (and go) to mars, the brain. If we can master our intelligence we could do so much more than going to a desolate planet. TBH i believe the first mission to mars will leave us disappointed (we won't have learned anything - and we don't really need mars for our future).