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John Patrick asked an intriguing question on the Discussion forum, and so far has 74 replies on the subject of who would be willing to go to Mars to participate in a terraforming project.
It's a fascinating and informative conversation, in parts comparing an expedition to Mars by our descendants to the migration of the Pilgrim fathers to Ameica... at least on an emotional level.
However, there's also practical discussion of propellants, financing, and the need for a staging colony on the moon, and much more.
The idea of terraforming Mars presupposes that there is no one already on Mars to object to terraformation. But what if there were? One correspondent mourns the fact that we would make Mars the way we wanted it to be, and its natural magnificence would be lost. Someone else sees it as a sort of Ark, and would import humpback whales etc.
Another assumption that I have not seen challenged is that humans would remain human as colonists. Would we? I wonder whether my perceptions have been warped ever since my visit to the Johnson Space Center in Houston, where I marveled at astronaut kidney stones. (They are really big!)
Would persons with large ureters adapt better? Would urinary incontinence be a desirable adaptation? That seems gross, not to mention unRomantic, but evolution is weird.
If weightlessness causes skulls to thicken, and other bones to dwindle (and excess calcium to accumulate in the body's filtration/excretion systems) --not that Mars is without gravity.
And on http://en.wikipedia.org/wiki/Surface_gravity it is calculated that the surface gravity of Mars is