How do brain cells communicate with each other? Is the brain more or less active during sleep? What happens in the brain when you take psychedelics? How does your brain know that you want to move? Why do brain tissues have different colours? What is the ‘brain freeze’ sensation when eating or drinking something cold? What causes Alzheimer’s disease? Is there a link between rheumatoid arthritis and anxiety? How is a neuron made?  Do the male and female brain differ?