A reader who asked to remain anonymous writes: “This is a Ramon y Cajal drawing of a human motor cortex pyramidal cell. I am a student of neuroscience and greatly admire Ramon y Cajal not only for his scientific contributions but for the artistic and beautiful quality of his images. This image reminds me of the vast and incredible power of the neocortex, and of the amazing capability of the human body.”
Originally published January 20, 2009. Copyright 2009 Carl Zimmer.