Are computers smarter than humans? Why is it easier to learn a language as a kid? What happens in the brain when you take psychedelics? Why do Dutch people say “I have sawdust in my head” when they do something stupid? Can you feel pain in your brain? Can I learn from a text by listening to it while I sleep?  Do we only use 10% of our brain? What is fainting? Why are you grumpy after a bad night of sleep? How do brain cells communicate with each other?