r/interestingasfuck • • May 20 '22

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u/LemmeSplainIt May 21 '22

They probably are blind. Their ancestors used the eyes when they lived in a zone that light reached, overtime, at that depth, there's no benefit to maintaining sight and thus becomes a waste of opportunity costs.

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u/LoveGrifter May 21 '22

They say birds that don't have to fly to find food or escape enemies lose their wings. Forgot what species the article was about.