Can I learn from a text by listening to it while I sleep?  What is the ‘brain freeze’ sensation when eating or drinking something cold? What happens in the brain with ALS? Is the brain more or less active during sleep? Are emotions experienced in the heart or the brain? Is dopamine good for you and serotonin bad? Is there a link between rheumatoid arthritis and anxiety? Can a brain scan show whether people are already producing their language response while their conversation partner is still speaking? How can I find out which stage of cognitive decline I am in, and how can I prevent Alzheimer’s disease or dementia? Do we really have a reptile brain, a mammal brain, and a human brain inside our heads?