This is almost completely irrelevant to photography but it may still interest some of us. Octopus and squids have only one kind of sensor in their eyes, so one might think they only see in black and white, but their body patterns adapt to the colors of their environment. So how do they see colors?
A paper published yesterday shows that they see color by using the same chromatic aberrations that we all hate, turning this optical problem into a novel solution:
http://www.pnas.org/content/early/2016/ ... 78113.full
Octopus color vision based on chromatic aberrations
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