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Q&A How would a species turn its skin to stone?

I'm making a species that turns the outer layers of its skin to stone, for defense purposes. It'll also have eyes that glow yellow, due to ingesting sodium vapor or helium. Is there some way to com...

5 answers  ·  posted 6y ago by Geoff‭  ·  last activity 6y ago by Geoff‭

Question aliens