Are there people or animals with more or fewer than two brain hemispheres? Why is sleep so essential? Why do some people remember things better than other people? Why don’t we use stem cell therapy for MS? What causes Alzheimer’s disease? What happens in the brain with ALS? How can I find out which stage of cognitive decline I am in, and how can I prevent Alzheimer’s disease or dementia? How is it possible that we can hear either ‘green needle’ or ‘brainstorm’ whilst the audio fragment remains the same? Do the male and female brain differ? What happens in the brain when you take psychedelics?