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Q&A Could a land vertebrate re-evolve gills after moving back into the water?

I know there are examples of land vertebrates moving back into the oceans, such as in the case of whales, and marine reptiles, but in every case that I know of when a land vertebrate moves back int...

3 answers  ·  posted 5y ago by Anders Gustafson‭  ·  last activity 5y ago by Anders Gustafson‭

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