Does a haircut affect my brain?

Is the brain the largest organ in the human body? What happens to the brain when we fall asleep? Why does a song get stuck in my head? We at World Book answer all of your questions related to the brain and head. Answer Me This, World Book answers questions about such topics as food, inventions, and sea creatures, too. We help you make sense of the world with informative and funny answers. Well . . . at least we think they are funny.