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

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

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 ...