How do brain cells communicate with each other? Is there a link between rheumatoid arthritis and anxiety? Why is sleep so essential? How is it that some people see an object as blue, while others say that same object is green? What is the ‘brain freeze’ sensation when eating or drinking something cold? Why is it easier to learn a language as a kid? Why is some information stored so quickly in the brain, while other information takes much longer? Does a 14T MRI scanner make more noise than a 3T MRI scanner? Can you feel pain in your brain? Why do brain tissues have different colours?