Do colours appear the same to everyone? What is the ‘brain freeze’ sensation when eating or drinking something cold? Are there people or animals with more or fewer than two brain hemispheres? How is it that some people see an object as blue, while others say that same object is green? Why do some people remember things better than other people? What happens in the brain with ALS? Can you distinguish between people who are visual or auditory learners? What is fainting? Are computers smarter than humans? How does our brain create a 3D world? Is this possible with just one eye?