>because our vision requires light. doesn't that assume that requiring light cam... | Hacker News

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		dominotw on Aug 5, 2016 \| parent \| context \| favorite \| on: A molecule called ‘Sandman’ could help solve the ‘... >because our vision requires light. doesn't that assume that requiring light came before sleeping at night. It could be the opposite, our vision requires light because we sleep at night?

dsr_ on Aug 5, 2016 [–]

Optical vision does not seem to require sleep:

https://en.wikipedia.org/wiki/Sleep_in_fish

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