The Smithsonian website (Why the Octopus Brain is so Extraordinary) says: some scientists argue it could be the first intelligent being on the planet. They can complete puzzles, untie knots, open jars and toddler proof cases, and are expert escape artists from aquariums. livescience.com (Octopuses may be so terrifyingly smart because they share humans' genes for intelligence) calls them: terrifyingly smart I understand it is not very easy to define human intelligence either, but it is fair to...
