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Q&A How would or could a creature with a crystalline sail evolve?

I recently came up with a lizard that had a sort of crystal-gem like attachment on its back. The problem was finding a way for such a thing to have evolved to have a largish crystal on its back. ...

6 answers  ·  posted 8y ago by Skye‭  ·  last activity 8y ago by Skye‭

Question reality-check evolution creature-design