Why are you grumpy after a bad night of sleep? Is there a link between rheumatoid arthritis and anxiety? Why do people still receive electroshock therapy? Did the gigantic dinosaurs also have gigantic brains and a gigantic number of neurons? Can brain implants read and control our minds? What is the ‘brain freeze’ sensation when eating or drinking something cold? What happens in the brain when you take psychedelics? Can you unlearn sleeping in the dark? Why do some people remember their dreams and others do not? Why do some people remember things better than other people?