If the goal is true colonization, what physical price might humanity accept regarding the Martian-born lineage?
Answer
A population that can only thrive on Mars
The long-term outlook suggests that if the goal is true colonization, humanity must accept the eventual divergence of the Martian and Terran human species. The physical price associated with becoming a multi-planetary species might be the creation of a population that is physically specialized and adapted to the Martian environment (0.38g) to the extent that they can only thrive there. This means their cardiovascular conditioning, bone strength, and muscle mass would render them unable to safely withstand the constant, intense physical stresses of Earth’s 1g gravity well.

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