Why don’t we use stem cell therapy for MS? What is fainting? Can you distinguish between people who are visual or auditory learners? How is it that some people see an object as blue, while others say that same object is green? Why do brain tissues have different colours? How is a neuron made?  Is the brain more or less active during sleep? Why do some people remember things better than other people? Is there a link between rheumatoid arthritis and anxiety? How does music affect mental health?