Because we needed to keep a running tally of friends and foes to navigate thorny hierarchies and shifting alliances, we had to have brains that were up to the task (which is why this theory is also ...

Octopuses, squid and cuttlefish may have evolved large brains because of the challenges posed by their environments rather ...

(Eric VOLTO/500px/Getty Images) Biologists have long believed that having a large brain, relative to your body, might go hand ...

At the Marine Biological Laboratory, Reporter David Abel allows an octopus to suction his hand. (David L. Ryan/ Boston Globe Staff) (undefined, David Abel) WOODS HOLE — Their donut-shaped brains are ...

Cephalopod intelligence is a measure of the cognitive ability of the cephalopod class of molluscs. Intelligence is generally defined as the process of acquiring, storing, retrieving, combining, ...

We named him Squirt – not because he was the smallest of the 16 cuttlefish in the pool, but because anyone with the audacity to scoop him into a separate tank to study him was likely to get soaked.

Octopuses and other camouflaging cephalopods may be the literal embodiment of “now you see me, now you don’t.” Using both rapid color and texture changes, octopuses can blend into nearly every ...