3 ms·

Ummmm... how do you think that things were hundreds or thousands of years ago?

• Retra 8y ago
  It's not clear what you're trying to say. All human colonization to date has been dependent upon fertile lands or extensive outside support. If we want to colonize Mars, we should prove we can survive without these things, and since nobody has done that on Earth, why should anybody they think it can be done on another planet?
• lisper 8y ago
  In the Nevada desert? Pretty much the same as they are today: uninhabited.