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May 7 2014

How Humans And Squid Evolved To Have The Same Eyes


Eyes and wings are among the most stunning innovations evolution has created. Remarkably, these features have evolved multiple times in different lineages of animals. For instance, the avian ancestors of birds and the mammalian ancestors of bats both evolved wings independently, in an example of convergent evolution. The same happened for the eyes of squid and humans. Exactly how such convergent evolution arises is not always clear.

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