[rudra]

living on mars is surely possible. certainly possible and a necessity. an asteroid falling on earth and wiping us is a very probable scenario. so i think it is not a question of whether it is possible to expand to other rocks near and far but how..

the financial cost is not going to stop us if suddenly we discover tomorrow that a massive rock is coming towards earth and if all of us on earth work together and build a few massive bombs and rockets to carry those and then target the rock effectively, then we will do so. This is the magic of human beings. we come together when we really need to. It might end up being a similar scenario. May be we will find that colonizing mars or some other planet or satellite will be more economically viable in such a scenario. then we will run for that.

Also for a sustainable self-sufficient economy there, i think we will need AI and robots . At very high level of functionality. But yes..we are already on our way ...

If we survive long enough ..that is dont wipe ourselves in some freak accident, then we will be there within the next 100 years ..i am sure.