What is already known about long covid and the brain? What causes Alzheimer’s disease? Are emotions experienced in the heart or the brain? How can I find out which stage of cognitive decline I am in, and how can I prevent Alzheimer’s disease or dementia? How is it possible that we can hear either ‘green needle’ or ‘brainstorm’ whilst the audio fragment remains the same? Why are you grumpy after a bad night of sleep? Why do some people remember things better than other people? Which brain region is the most important? How does music affect mental health? Is the brain more or less active during sleep?