Is our universe a brain?

Brains that I know all come in the split-in-half form. For most humans, the left brain is analytical and the right brain is emotional. The left controls the right body and the right controls the left body. Well, at least I am sure this is true for the hands and the eyes. For left handed people the roles are reversed. I have been puzzled by the split-in-half form for a long time. Why split the emotional and the analytical functions physically? The two halves are connected to each other by a thick nerve bundle called 'corpus callosum', what a sexy name!.Current cosmology is also split in two; quantum and relativity. Quantum for the very small, and relativity for the very large. Quantum describes the content, and relativity describes the context; space-time. Quantum for the discrete, relativity fot the continious. And they don't mix at the moment. The expectation is that they will eventually merge into one theory.I think these dualities are similar. The analytical (or content oriented) side is like quantum theory and the emotional (or context oriented) side is like relativity theory.There is an analogy in music as well. Rythm comes first. Then with the introduction of different colors of sound we get melody and harmony. Melody for analytical and harmony for emotional. Emotion happens at once all over, like harmony. Logic goes in steps of decision, like melody. If we trust the music analogy, then the two halves are joined by time, implying a clock mechanism in brain fed through corpus callosum. If we carry this to cosmology, then time becomes the unifying entity.The implication is that we live in the brain of a living being. If the brain is this big, then imagine the body. Maybe this kind of being would not have a body, it would control everyting by it's brain powers. Does this being live in a society of other like-minded individuals?