Tempting as it is to suggest that those who advocate spending tax dollars to send humans to Mars "try" breathing vacuum for a while to see if they can "overcome

Tempting as it is to suggest that those who advocate spending tax dollars to send humans to Mars "try" breathing vacuum for a while to see if they can "overcome" that significant obstacle to Martian colonization... I think it's actually more polite to just say "no, I'm afraid you're wrong". No. I'm afraid you're wrong.