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Q&A Low bio-diversity, high oxygen : implications for development of tool-using life

The trope here is a world with 3-4 X earth atmosphere with high oxygen content (30%). Nice things about this are it enables heavy beasts to fly, and the high pressure smoothes out the negative effe...

4 answers  ·  posted 8y ago by rumguff‭  ·  last activity 8y ago by rumguff‭

Question planets evolution civilization