Some parts of our brains evolved millions of years ago; others more recently. The display along this wall illustrates some of the many evolutionary pathways leading to the human brain: the California seahare senses touch but lacks central hub for its nervous system, and the green iguana has a brain that is more instinctual and reflexive than do mammals.
Credit: Courtesy of AMNH/D. Finnin
Note: Representative image at left is often cropped for display purposes. Downloaded high-resolution images are not cropped.