How do brain cells communicate with each other? Is dopamine good for you and serotonin bad? Are there people or animals with more or fewer than two brain hemispheres? Do colours appear the same to everyone? What is the effect of a visual impairment on the brain? And is there anything we can do to restore it? How does your brain know that you want to move? Can brain implants read and control our minds? Why is some information stored so quickly in the brain, while other information takes much longer? What is already known about long covid and the brain? How does music affect mental health?