Brain

Compared to the animal world, the brain is our best developed organ. Humans have a lower brain that controls our reflexes, including breathing, without our thinking about it. But the higher parts of the brain have allowed us to think, calculate and aspire. This is the job of the gray matter (or cortex). Even a quick look shows the brain is split into two halves. Although they look the same, each side thinks differently. One hemisphere specializes in tasks that require coordination and ability to place things correctly; the other is better at performing abstract tasks such as math. These discoveries may help to explain the greatest of human puzzles; why are we all so different?