Neuroscientist Daniel Bor was long troubled by the fact that once all our physical needs have been met, humans - uniquely among animals - engage in mentally (and thus biologically) wasteful behaviour, such as solving crossword puzzles and reading. This observation set him on a path toward a new theory of consciousness. In "The Ravenous Brain", Bor argues that human knowledge evolved to gather knowledge, specifically to extract meaningful patterns from raw information (as we do while playing word games). The ability to structure information offered individuals a distinct evolutionary advantage. Consciousness, therefore, emerged as a natural extension of our drive to innovate. A controversial argument from an up-and-coming researcher, "The Ravenous Brain" is a wide-ranging attempt to elucidate one of science's biggest mysteries.