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Q&A Rigorous Science Meta
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Rigorous Science What gases could be present in a viable atmosphere for humans?

I'm working on a story involving humans looking for another habitable planet, and I have been scouring the net for days, finding lots of info on varying levels of oxygen and nitrogen, but none that...

3 answers  ·  posted 5y ago by thelefthorse‭  ·  last activity 5y ago by thelefthorse‭

Question atmosphere space-travel