Are there people or animals with more or fewer than two brain hemispheres? Why is sleep so essential? How is it possible that we can hear either ‘green needle’ or ‘brainstorm’ whilst the audio fragment remains the same? Is the brain more or less active during sleep? Why do people still receive electroshock therapy? How is it that some people see an object as blue, while others say that same object is green? Is dopamine good for you and serotonin bad? Can brain implants read and control our minds? Why do children outperform adults in the game of ‘concentration’? Can a brain scan show whether people are already producing their language response while their conversation partner is still speaking?