Is dopamine good for you and serotonin bad? What is already known about long covid and the brain? How is it possible that we can hear either ‘green needle’ or ‘brainstorm’ whilst the audio fragment remains the same? Is there a link between rheumatoid arthritis and anxiety? Why do brain tissues have different colours? Why don’t we use stem cell therapy for MS? Why do Dutch people say “I have sawdust in my head” when they do something stupid? How does speaking multiple languages impact the brain? Do colours appear the same to everyone? Which brain region is the most important?