Tag: eye evolution
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Cephalopods, from head to foot, part 2: Here’s lookin’ at you, squid
Much thanks to my brother for the excellent title. First, let’s talk a bit about how eyes evolved in general. First, there was the eyespot–a cell, or even part of a single celled organism, that has chemicals that react to light. It can’t really see beyond “there is light” vs “there isn’t light”, but even…