Fantastic article from i09 (and a friend), How did brains evolve?
Our brains are each made of billions of cells, called neurons, that link together to form living circuit boards that control everything from our thoughts to our behaviors to the rhythm of our breathing. We aren’t the only creatures with brains, but our brains are unique in terms of their size relative to our bodies, and in terms of their complexity. Just how did incremental changes to ancient animal brains, over millions of years, eventually result in this most sophisticated of living, computing machines?
Check out the in depth and thoughtful analysis of how we have come to be the way we/our brains are!