Last spring, London neuroscientist-turned-cartoonist Matteo Farinella published Neurocomic, a graphic novel about a man who falls into a brain. In this illustration from the book, Farinella uses a forest metaphor to depict brain cells and neurons as a dense, sprawling network of intertwined tree roots and branches. "The brain is very complex--there are billions of neurons connected in ways that we are only beginning to understand," Farinella says. Paul Lipton, a neuroscientist at Boston University, notes the image illustrates
the brain's structural diversity. "The brain is indeed a forest," he says, "whose trees, or neurons, are its defining feature."