1. At the rate we keep growing, we have no option but to expand to “out there”. We are already planning on sending people to mars. That fate has already started.

  2. I think going into space is so expensive that the human race will hit a wall after which it will have to become more efficient or die out.

    • I think, perhaps, you under estimate human ingenuity. There are undoubtedly rewards for any group able to start sending people to Mars. Just look at the progress Space-X has made.

    • Where exactly is this space wall? I think we can at least make it to Mars. If Mars, then further out. If further out, than other stars. Prove me wrong.

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