Why do some people remember their dreams and others do not? Can you feel pain in your brain? How does music affect mental health? How heavy was Einstein’s brain? Does the size of your brain say anything about intelligence? Which brain region is the most important? What happens in the brain when you take psychedelics? Why do brain tissues have different colours? Why do Dutch people say “I have sawdust in my head” when they do something stupid? How can I find out which stage of cognitive decline I am in, and how can I prevent Alzheimer’s disease or dementia? How do brain cells communicate with each other?