Brain and Visual Perception: The Story of a 25-Year CollaborationScientists' understanding of two central problems in neuroscience, psychology, and philosophy has been greatly influenced by the work of David Hubel and Torsten Wiesel: (1) What is it to see? This relates to the machinery that underlies visual perception. (2) How do we acquire the brain's mechanisms for vision? This is the nature nurture question as to whether the nerve connections responsible for vision are innate or whether they develop through