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There are fish people. So...?



There are currently mammals living in the water, some people already have webbed feet, the "fish people" had evolved over 5,000 years, and their ancestors may have had access to advanced genetic tech. The book also references epigenetics pretty heavily in that part of the book; presumably that's involved in the evolution of all of the different surviving human groups.

It certainly wasn't the hardest science element of the book, but it seems pretty well supported for scifi.

That was also one pretty minor element of the book as a whole.

I still can't think of another book that's 'harder' scifi (and not also like really-close-near-future).




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