What is already known about long covid and the brain? Why do Dutch people say “I have sawdust in my head” when they do something stupid? What is the impact of speaking multiple languages on the brain? What happens when you have a blackout during an exam? How heavy was Einstein’s brain? Does the size of your brain say anything about intelligence? Is dopamine good for you and serotonin bad? Why is some information stored so quickly in the brain, while other information takes much longer? What is the effect of a visual impairment on the brain? And is there anything we can do to restore it? Can I learn from a text by listening to it while I sleep?  What is fainting?