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Q&A How dark can a habitable planet be?

I'm picturing a world with a permanent, dark, overcast sky, but I'm wondering how dark it can be before photosynthesis is no longer an option. It looks like there are a good number of plants that ...

6 answers  ·  posted 9y ago by apaul‭  ·  last activity 9y ago by apaul‭

Question weather flora habitability