Abstract
GREGORY1 has viewed the evolution of the visual sense as a “hen and egg” problem involving eyes and brains. It is only reasonable to infer that eyes and brains have mutually exerted evolutionary pressures, but setting aside the somewhat arbitrary distinction between the two, because some eyes incorporate part of the integrative mechanism, partnership between an eye (whether of the simple or compound type) and an integrative apparatus is not the only prescription for a successful photosensory system.
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MILLOTT, N. Dermal Photosensitivity and the “Hen and Egg” Problem. Nature 215, 768–769 (1967). https://doi.org/10.1038/215768a0
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DOI: https://doi.org/10.1038/215768a0
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