What is already known about long covid and the brain? Why are you grumpy after a bad night of sleep? How do brain cells communicate with each other? Do colours appear the same to everyone? How can I find out which stage of cognitive decline I am in, and how can I prevent Alzheimer’s disease or dementia? How does your brain know that you want to move? Does neuroscience provide better explanations for behaviour than psychology? Can you distinguish between people who are visual or auditory learners? Is dopamine good for you and serotonin bad? How heavy was Einstein’s brain? Does the size of your brain say anything about intelligence?