Why do Dutch people say “I have sawdust in my head” when they do something stupid? Why do some people remember their dreams and others do not? How does your brain know that you want to move? What is the impact of speaking multiple languages on the brain? Is it true that you can be ‘left-brained’ or ‘right-brained’? What happens in the brain with ALS? Are there people or animals with more or fewer than two brain hemispheres? Can I learn from a text by listening to it while I sleep?  Why do people still receive electroshock therapy? Is dopamine good for you and serotonin bad?