We will not be going to mars because of an important science that hasn't been developed yet. (Maybe NASA has developed it and never told anyone about it)

Anyway, the people researching this area are called kooks and unscientific. However the field is resplendent with healing affects and body self regeneration. Without this, no man will survive the trip to Mars.

Sorry, I am being enigmatic. But I use this as my barometer if anyone is actually doing what they are saying in space.