alt Hacker NewsDon't we have single celled organisms with more than one 'eye' now?
We've been able to sense light and shadow even before we became multicellular, didn't we? And this article seems to be implying rather otherwise.
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emmelaich • today at 1:13 AM
I was looking for that too. I'm sure I've read that single cell animals were sensitive to light (and/or heat). I guess it's a speculation though, because we'd have no physical evidence.
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Jellyfish (cnidarians) do phototaxis - https://journals.biologists.com/jeb/article/227/18/jeb247503...