Why would species leave the habitable zone on tidally locked planet to go live in the hot region of the planet and/or the cold one?
Imagine a tidally locked planet that revolves around the star at just the right distance that a habitable zone can be formed in between the scorching desert side of the planet and an icy desert side.
Lets assume that we have a humanoid species with intelligence of Earth's apes that lives in that habitable zone. Lets also assume that the species is highy adaptable and manages to survive in the hot and icy zones of the planet in spite of the reason that those two areas are deemed "inhabitable".
What occurence would cause the species to rationally leave the habitable zone and inhabit the "inhabitable" zone instead? The migration needs to be permanent and irreversible and not a product of evolution - more product of some reshapement of enviorment.
This post was sourced from https://worldbuilding.stackexchange.com/q/95627. It is licensed under CC BY-SA 3.0.
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