Is the brain more or less active during sleep? What causes Alzheimer’s disease? Did the gigantic dinosaurs also have gigantic brains and a gigantic number of neurons? Can I learn from a text by listening to it while I sleep?  Why do Dutch people say “I have sawdust in my head” when they do something stupid? When are we able to solve MS? What is already known about long covid and the brain? How do brain cells communicate with each other? Why do some people remember things better than other people? How does speaking multiple languages impact the brain?