Why do some people remember their dreams and others do not? How does stress affect your brain? Can I learn from a text by listening to it while I sleep?  What is the impact of speaking multiple languages on 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? What happens in the brain with ALS? Why is some information stored so quickly in the brain, while other information takes much longer? Why do Dutch people say “I have sawdust in my head” when they do something stupid? Are there people or animals with more or fewer than two brain hemispheres? Why do some people remember things better than other people?