How do brain cells communicate with each other? Why do Dutch people say “I have sawdust in my head” when they do something stupid? Why do people still receive electroshock therapy? What is the impact of speaking multiple languages on the brain? What happens when you have a blackout during an exam? What causes Alzheimer’s disease? How does music affect mental health? Can I learn from a text by listening to it while I sleep?  Is the brain more or less active during sleep? Why are you grumpy after a bad night of sleep?