Are there people or animals with more or fewer than two brain hemispheres? What is the ‘brain freeze’ sensation when eating or drinking something cold? How does music affect mental health? Can you distinguish between people who are visual or auditory learners? Why do people still receive electroshock therapy? Why don’t we use stem cell therapy for MS? Why do children outperform adults in the game of ‘concentration’? Is the brain more or less active during sleep? Can I train plasticity? Why do some people remember things better than other people?