True, a single-planet species cannot survive for long. Excluding costs, what if some natural disaster or human created catastrophe eliminates us...
Yeah I agree with, the downside to it is that it is very resource intensive given the limited resources we have currently. Probably not a plausible...
Space Colonization and Terraforming of planets I guess the solution is simple, why not just live outside of earth? If you have not heard of...
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