Lava tubes in Hawaii could be a dress rehearsal for Mars colonies

Using lava tubes as a test vehicle for living on an alien world may reveal the innate human characteristics that could seriously impact/destroy any attempt to live on either our moon or Mars, especially if the test subjects are male and female pair groups. However, there is a more urgent problem on Earth as Catastrophe has pointed out. Leaving that to fester may eventually eliminate the funding via the political processes for ambitious hostile alien world colonization.
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