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Q&A Designing animals to survive on a planet with a low atmospheric pressure?

I'm trying to create a habitable planet but with a low atmospheric pressure, similar to Mars. But instead with 15 percent of Earth's atmospheric pressure, what traits can I give my animals so they ...

3 answers  ·  posted 8y ago by Stephanie‭  ·  last activity 8y ago by Stephanie‭

Question biology evolution creature-design