Posted by tourdemars to Mars Gravity Biosatellite at March 20, 2004 11:45 AM

If you're lucky, you might someday walk on the surface of Mars. For some scientists, the question is no longer whether people will ever get to Mars. It's a question of when people will travel there. The most cautious of the bunch say it may take many decades to overcome the obstacles standing in the way of such an expedition. Others are more optimistic.