Is the balanced brain between left and right hemispheres, thanks to the corpus callosum, necessarily more "evolved"? I found this review of "Leonardo’s Brain: Understanding Da Vinci’s Creative Genius" by Leonard Shlain fascinating. From Brain Pickings: "Although both art and science require a high degree of creativity, the difference between them is stark. For visionaries to change the domain of art, they must make a breakthrough that can only be judged through the lens of posterity. Great science, on the other hand, must be able to predict the future. If a scientist’s hypotheses cannot be turned into a law that can be verified by future investigators, it is not scientifically sound. Another contrast: Art and science represent the difference between “being” and “doing.” Art’s raison d’être is to evoke an emotion. Science seeks to solve problems by advancing knowledge.
"Leonardo’s story continues to compel because he represents the highest excellence all of us lesser mortals strive to achieve — to be intellectually, creatively, and emotionally well-rounded. No other individual in the known history of the human species attained such distinction both in science and art as the hyper-curious, undereducated, illegitimate country boy from Vinci." Read the article: Leonardo’s Brain: What a Posthumous Brain Scan Six Centuries Later Reveals about the Source of Da Vinci’s Creativity by Maria Popova, Brainpickings.org