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The Octopus Is Smart as Heck, But Why?

A bigger brain for a creature with hands is an evolutionary advantage, because that allows complex behaviors to be carried out with hands. I bet octopuses are intelligent for a similar reason. Its body is like one big hand, and there are lots of complex behaviors it can carry out with those tentacles. Similar for its color changing skin. There are many complex and useful ways that skin can be used, so it pays to have a big brain

news.ycombinator.com/item?id=1

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