ready, or earth independent, when we starr breaking that tie back to the o planet, that'sr a different reag dimension. i mean, you really have to carry with you, or you have to have mi enough ashussurance that you ca use the carbon dioxide of mars a to get oxygen, can you get water out of the martian environment.n you have to really prove that some of those things are there.e i think terrestrial exploration little different because it wasn't quite the level of what e we're doinrrg here, where we're essentially putting a human in an environment that the human cannot live on on its own.puttig and we have to carry with it so enough support capability to keep the human alive and functioning. >> how much of that ability -- e by the way, if you have and questions, feel free to come toe the microphones and we'll include your questions in this conversation. how much of the ability to, you know, live off the martian land. do we have to prove before we put people on the surface, do you think? >> there's been a number of opl studies on that, that show if you can institute resource utilization, that is