Why the Octopus Brain is so Extraordinary

TED-Ed, Cláudio L. Guerra

An octopus is a lot brainier than you might imagine considering one of its closest living relatives is a sea slug. In fact, 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. Even more fascinating—their intelligence stems from a completely unrelated path to human intelligence, and about two-thirds of their neurons are in their arms, not their head.