Why is it easier to learn a language as a kid? Is dopamine good for you and serotonin bad? What happens in the brain with ALS? How does your brain know that you want to move? Why do people still receive electroshock therapy? Are there people or animals with more or fewer than two brain hemispheres? Do the male and female brain differ? Do colours appear the same to everyone? Why do some people remember their dreams and others do not? Why do some people remember things better than other people?