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Q&A How long would it take for humans to develop "tails" for use in water by evolution?

Ignoring the tails humans already have. Let's say it's the year 2016. Merpeople exist. They live in the ocean or rivers, breathe air, and have to surface occasionally. They also evolved from earli...

2 answers  ·  posted 8y ago by One Normal Night‭  ·  last activity 8y ago by One Normal Night‭

Question evolution merfolk