What effect does cyanide have on the brain? Why is sleep so essential? Are emotions experienced in the heart or the brain? How does speaking multiple languages impact the brain? Why don’t we use stem cell therapy for MS? What is already known about long covid and the brain? How can I find out which stage of cognitive decline I am in, and how can I prevent Alzheimer’s disease or dementia? Why do Dutch people say “I have sawdust in my head” when they do something stupid? Why do people still receive electroshock therapy? Why do some people remember their dreams and others do not?