Why Does The Brain Have Two Hemispheres?

It may seem like a simple and even childish question. However, why does the brain have two hemispheres? Is there any particular reason why its evolution meant that it didn’t form a unified and perfectly spherical organ? As a matter of fact, this question, far from being too simplistic, is of great interest to the scientific community. For starters, there are many who, on seeing the shape of a brain, are intrigued by all those folds of the cerebral cortex. Indeed, this organ, far from being spherical and smooth, exhibits a surface full of bumps and folds. Furthermore, if we…