Is dopamine good for you and serotonin bad? How are memories made in the brain? How does personality arise? And does it change over the course of your life? What is fainting? Why do Dutch people say “I have sawdust in my head” when they do something stupid? Why is sleep so essential? What effect does cyanide have on the brain? How does music affect mental health? Why do some people remember their dreams and others do not? Do colours appear the same to everyone?