Original Summary

Ok, this might be more of a Reddit question or an xkcd’s “What if”, but let’s try here first.<p>When people talk about investing in tech so that, if Earth gets bad enough, we have a plan B in colonizing Mars, I think we most agree that it’s nonsense. But it seems like a good thought experiment.<p>What would have to happen to Earth so that, given we have developed the technology, terraforming Mars and moving some people there is a sensible option?<p>Mars having no water, no atmosphere, and no organic matter make it a high bar.<p>I believe global nuclear war or the worst predictions of climate change won’t cut it. A meteor, not if it is the same size the one that already hit Earth and wasn’t enough to kill all life, much less remove atmosphere or water.<p>So, what is this scenario where putting the resources (again, given we have the tech) to create a colony on Mars make sense?

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  • 信息来源：Hacker News 新项目
  • 发布时间：2026/10/14 01:09:43