Tumblr Thread About Evolutionary Genes Is Fascinating And Confusing

How? How is it possible that a bird is more closely related to a crocodile than a turtle?

At least we're not the only ones confused about all these evolutionary genetics, Tumblr user aplpaca started this interesting (and very confusing) thread.

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$Fish - I once read an article that emphasized there is no such thing as a fish. Sharks and rays, lamprey, lobe-finned fish like lungfish and coelacanth, bichir and sturgeon, and of course the multiple infraclasses of more "modern" fish groups are all only very distantly related to one another. They've maintained semi-similar body structures only because there are limited ways to efficiently move through water as a vertebrate. This And this$

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