What effect does cyanide have on the brain? How does your brain know that you want to move? How does music affect mental health? When are we able to solve MS? Why do Dutch people say “I have sawdust in my head” when they do something stupid? Can you unlearn sleeping in the dark? Do we only use 10% of our brain? What goes wrong in the brain when I lose focus? What is already known about long covid and the brain? Are there people or animals with more or fewer than two brain hemispheres?